Skip to main content
Hi
!
Hi!
Sign in
or
register
Daily Deals
Brand Outlet
Gift Cards
Help & Contact
Sell
Watchlist
Expand Watch List
My eBay
Expand My eBay
Summary
Recently Viewed
Bids/Offers
Watchlist
Purchase History
Buy Again
Selling
Saved Feed
Saved Searches
Saved Sellers
My Garage
Sizes
My Collection
Messages
PSA Vault
Expand Notifications
Please
sign-in
to view notifications.
Expand Cart
Loading...
eBay Home
Shop by category
All Categories
Search
Advanced
Best selling products: Best
Silicate Aquarium Water Test Kits
Bestselling
Top Rated
1
Rank 1
API Freshwater Master Test Kit
(290)
$29.99 New
$29.99 New
$22.99 Used
$22.99 Used
2
Rank 2
API Saltwater Marine Master Aquarium Test Kit
(95)
$22.99 New
$22.99 New
$12.50 Used
$12.50 Used
3
Rank 3
Hanna Instruments HI782 Checker HC Marine Nitrate Water Testing Colorimeter
$39.99 New
$39.99 New
$31.00 Used
$31.00 Used
4
Rank 4
Mars Fishcare API Stress Coat - 1 Gallon
(47)
$59.95 New
$59.95 New
---- Used
No used products available
5
Rank 5
API GH and KH Test Kit 58 317163010587
(47)
$13.49 New
$13.49 New
---- Used
No used products available
6
Rank 6
Seachem 116043601 Water Conditioner - 5.3gal
(41)
$7.99 New
$7.99 New
---- Used
No used products available
7
Rank 7
Hanna HI-98319 Marine Waterproof Salinity Test Kit
(4)
$81.25 New
$81.25 New
$74.99 Used
$74.99 Used
8
Rank 8
Hanna HI-772 Marine Alkalinity Checker
(6)
$67.99 New
$67.99 New
$60.00 Used
$60.00 Used
9
Rank 9
Seachem Safe Water Conditioner - 8.8 oz
(38)
$15.39 New
$15.39 New
---- Used
No used products available
10
Rank 10
Sea-lab No28 Automatic Replenisher 1kg Block Supplies Trace Calcium and More
(12)
$39.14 New
$39.14 New
---- Used
No used products available
11
Rank 11
Hach Model 5-B Total Hardness Test Kit
(53)
$69.99 New
$69.99 New
$39.99 Used
$39.99 Used
12
Rank 12
"Acurel F25 Millimeter Water Clarifier, Aquarium, Treats 250 Gallons"
(53)
$8.69 New
$8.69 New
---- Used
No used products available
13
Rank 13
Brightwell Aquatics BAC2L Water Conditioner - 67.6oz
(16)
$63.17 New
$63.17 New
---- Used
No used products available
14
Rank 14
Seachem 437 Prime Fresh and Saltwater Conditioner - 1L
(2)
$31.59 New
$31.59 New
---- Used
No used products available
15
Rank 15
API Tap Water Conditioner 32 Oz 52q
(9)
$23.79 New
$23.79 New
---- Used
No used products available
16
Rank 16
API 402M Reef Master Test Kit
(26)
$11.00 New
$11.00 New
---- Used
No used products available
17
Rank 17
Hanna Instruments HI701 Checker HC Handheld Colorimeter Chlorine
$67.99 New
$67.99 New
$40.00 Used
$40.00 Used
18
Rank 18
Hanna HI-774-25 Ultra Low Range Phosphate Checker
$19.99 New
$19.99 New
---- Used
No used products available
19
Rank 19
Hanna Instruments HI782-25 High Range Marine Nitrate Checker Reagents - 25 Tests
(3)
$27.99 New
$27.99 New
---- Used
No used products available
20
Rank 20
Salifert Freshwater Nitrate Test Kit
$16.69 New
$16.69 New
---- Used
No used products available
21
Rank 21
Red Sea R21510 Reef Foundation Pro - Salt Water Multi Test Kit
(60)
$82.47 New
$82.47 New
$35.00 Used
$35.00 Used
22
Rank 22
API Stress Coat Water Conditioner - 64 fl oz
(11)
$37.59 New
$37.59 New
$12.00 Used
$12.00 Used
23
Rank 23
Hanna Marine Magnesium Checker - HI783
(1)
$59.99 New
$59.99 New
$45.00 Used
$45.00 Used
24
Rank 24
API Ph Test & Adjuster Kit 250 Tests 29a
(13)
$13.09 New
$13.09 New
---- Used
No used products available
25
Rank 25
Seachem Labs Ammonia Alert Aquarium Water Test Kit
(29)
$9.50 New
$9.50 New
---- Used
No used products available
26
Rank 26
Seachem Alert Combo Pack PH Ammonia
(48)
$12.29 New
$12.29 New
---- Used
No used products available
27
Rank 27
HI780 Hanna marine pH Checker
(1)
$62.00 New
$62.00 New
$32.00 Used
$32.00 Used
28
Rank 28
Seachem Flourish Potassium 500ml 500 Milliliter
(19)
$10.00 New
$10.00 New
---- Used
No used products available
29
Rank 29
Seachem Stability - 100 Ml Asm125
(12)
$7.79 New
$7.79 New
---- Used
No used products available
30
Rank 30
Tetra 16837 BettaSafe Water Conditioner 1.69-ounce 50-ml Fish Aquarium
(21)
$4.99 New
$4.99 New
---- Used
No used products available
31
Rank 31
Salifert Freshwater CO2 Test Kit
$19.83 New
$19.83 New
---- Used
No used products available
32
Rank 32
Seachem Pristine Aquarium Treatment 500ml 001438
(10)
$20.99 New
$20.99 New
---- Used
No used products available
33
Rank 33
Tropic Marin All-For-Reef Water Additive - 26752
(3)
$47.18 New
$47.18 New
---- Used
No used products available
34
Rank 34
API Replacement Test Tubes With Caps 24ct
(12)
$28.32 New
$28.32 New
---- Used
No used products available
35
Rank 35
Seachem Prime Fresh and Saltwater Conditioner 50 Ml
(13)
$8.10 New
$8.10 New
---- Used
No used products available
36
Rank 36
SEACHEM STABILITY 1 LITER ( 33.8 fl. oz ) Bio-Filter Aquarium Fish Tank Cycle
$34.29 New
$34.29 New
---- Used
No used products available
37
Rank 37
API Ph Down Freshwater Aquarium Water Treatment 4 FL Oz
(8)
$9.09 New
$9.09 New
---- Used
No used products available
38
Rank 38
Seachem Neutral Regulator 500 Grams 250g Bottles
(15)
$13.99 New
$13.99 New
---- Used
No used products available
39
Rank 39
Seachem Alkaline Buffer - 300 G Asm236
(11)
$12.69 New
$12.69 New
---- Used
No used products available
40
Rank 40
Seachem Flourish Aquarium Plant Supplement 250ml/8.5oz
(1)
$9.74 New
$9.74 New
---- Used
No used products available
41
Rank 41
API Quick Start Water Conditioner For Aquariums 16-Ounce Pet Supplies Fish & A
(13)
$19.75 New
$19.75 New
---- Used
No used products available
42
Rank 42
API Quick Start Freshwater and Saltwater Aquarium Nitrifying Bacteria - 32-Ounce (89Q)
(7)
$5.96 New
$5.96 New
---- Used
No used products available
43
Rank 43
API Nitrite No2 Test Kit Aquarium 180 Tests Fresh or Salt Water Tanks
(11)
$12.99 New
$12.99 New
---- Used
No used products available
44
Rank 44
API 5 in 1 Test Strips 100 Count Freshwater Saltwater Aquarium 5in1 Ammonia
(3)
$26.49 New
$26.49 New
---- Used
No used products available
45
Rank 45
Salifert Calcium Ca Test Kit 50 to 100 Tests
(20)
$20.99 New
$20.99 New
---- Used
No used products available
46
Rank 46
HI781 Saltwater Nitrate Low Range Checker Hanna Instruments
(1)
$67.99 New
$67.99 New
$35.00 Used
$35.00 Used
47
Rank 47
Brightwell Aquatics MicroBacter Start XLM 250ml Pro Strength Reef Rapid Cycle
$11.80 New
$11.80 New
---- Used
No used products available
48
Rank 48
Tetra EasyStrips 6 in 1 Aquarium Test Strips 25 Count
(35)
$10.81 New
$10.81 New
$6.30 Used
$6.30 Used
49
Rank 49
API Fish Tank Aquarium Proper Ph 7.0 250gm
(14)
$14.69 New
$14.69 New
---- Used
No used products available
50
Rank 50
Seachem Stability Tank Stabilizing System 1.7 Oz
$7.95 New
$7.95 New
---- Used
No used products available
51
Rank 51
Seachem Cichlid Trace Elements 500ml 116070300
(8)
$18.03 New
$18.03 New
---- Used
No used products available
52
Rank 52
SEACHEM FLOURISH IRON 100 mL
(2)
$8.10 New
$8.10 New
---- Used
No used products available
53
Rank 53
Salifert Nh4 Ammonia Test Kit up to 50 Tests
(3)
---- New
No new products available
---- Used
No used products available
54
Rank 54
Seachem MultiTest Iron Test Kit Over 75 Tests H3
(6)
$17.69 New
$17.69 New
---- Used
No used products available
55
Rank 55
Red Sea Reef Foundation ABC Complete Liquid Supplement Kit - 3x 250ml
(7)
$35.99 New
$35.99 New
---- Used
No used products available
56
Rank 56
Tropic Marin All for Reef Essentials Saltwater Marine Aquarium 500ml
(2)
$26.54 New
$26.54 New
---- Used
No used products available
57
Rank 57
Seachem Flourish Advance 100ml Natural Phytohormone Supplement for Plants
(1)
$9.49 New
$9.49 New
---- Used
No used products available
58
Rank 58
Reef Advantage Calcium (1kg) - Seachem
(2)
$14.99 New
$14.99 New
---- Used
No used products available
59
Rank 59
Fritz Mardel Fish Less Fishless Fuel Ammonia Solution 2 Oz Treats 300 Gallons
(1)
$8.19 New
$8.19 New
---- Used
No used products available
60
Rank 60
Hanna High Range Copper Colorimeter - Checker HC
(2)
$49.95 New
$49.95 New
$40.00 Used
$40.00 Used
61
Rank 61
Red Sea Reef Foundation B 1 Liter Alkalinity KH Buffer USA
(2)
$31.99 New
$31.99 New
---- Used
No used products available
62
Rank 62
Red Sea NO3:PO4-X Water Additive
(16)
$36.99 New
$36.99 New
---- Used
No used products available
63
Rank 63
API 1-1/4oz Copper Test Kit 90 Tests Liquid For Fresh and Salt Water
(10)
$13.49 New
$13.49 New
---- Used
No used products available
64
Rank 64
Fluval Mini Master Test Kit A7867
(5)
$26.23 New
$26.23 New
$24.00 Used
$24.00 Used
65
Rank 65
Salifert No3 Nitrate Test Kit up to 60 Tests
(17)
$19.99 New
$19.99 New
---- Used
No used products available
66
Rank 66
Seachem Clarity - 100 Ml Asm145
(6)
$8.29 New
$8.29 New
---- Used
No used products available
67
Rank 67
Red Sea Fish Pharm Are 22023 Reef Foundation Buffer Supplement B for Aquarium 50
(5)
$24.99 New
$24.99 New
---- Used
No used products available
68
Rank 68
API LR8600 F/S Ammonia Watr Test
(68)
$14.50 New
$14.50 New
$8.99 Used
$8.99 Used
69
Rank 69
Hanna Instruments HI783-25 Marine Magnesium Checker Reagents - 25 Tests
$27.99 New
$27.99 New
---- Used
No used products available
70
Rank 70
Brightwell Aquatics Lugol's Solution Iodine Lugols 1oz 30ml
(5)
$16.99 New
$16.99 New
---- Used
No used products available
71
Rank 71
Seachem MultiTest Nitrite and Nitrate Test Kit 75 Tests
(3)
$14.39 New
$14.39 New
---- Used
No used products available
72
Rank 72
Red Sea Fish Pharm Are21455 Marine Care Program Ph/alkalinity Test Kit for
(1)
$26.99 New
$26.99 New
---- Used
No used products available
73
Rank 73
Jungle Tk301w Quick DIP Ammonia Test Strips 25-pack
(2)
$8.90 New
$8.90 New
---- Used
No used products available
74
Rank 74
Red Sea Fish Pharm Are22040 4-pack Coral Colors ABCD Supplements for Aquarium 1
(8)
$31.99 New
$31.99 New
---- Used
No used products available
75
Rank 75
API Quick Start Aquarium Nitrifying Bacteria Freshwater 4 Oz
(5)
$10.99 New
$10.99 New
---- Used
No used products available
76
Rank 76
Seachem Laboratories 075211 Marine Buffer 250 Gram
(4)
$10.79 New
$10.79 New
---- Used
No used products available
77
Rank 77
Sea-lab Sea Lab #28 Automatic Replenisher 1 Kilo Block
(2)
$29.99 New
$29.99 New
---- Used
No used products available
78
Rank 78
API High Range Ph Test Kit 1 1/4 FL Oz. Aph27 Mars Fishcare
(15)
$10.99 New
$10.99 New
---- Used
No used products available
79
Rank 79
Aquaforest Water Test PRO Pack (KH Ca & Mg) - inclusive Reference Solutions
$41.97 New
$41.97 New
---- Used
No used products available
80
Rank 80
Seachem Laboratories 075199 Malawi Victoria Buffer 300 Gram
(2)
$11.29 New
$11.29 New
---- Used
No used products available
81
Rank 81
API Tap Water Conditioner 1 Gallon 52d
(15)
$51.99 New
$51.99 New
---- Used
No used products available
82
Rank 82
Seachem Laboratories Asm966 MultiTest Copper Test Kit
(7)
$18.95 New
$18.95 New
---- Used
No used products available
83
Rank 83
Fritz Aquatics Fritzzyme Turbostart 900 Saltwater Live Nitrifying Bacteria 4 Oz
(1)
$25.49 New
$25.49 New
---- Used
No used products available
84
Rank 84
19543 Tetra EasyStrips 6-in-1 Aquarium Test Strips 100 Ct
(56)
$29.99 New
$29.99 New
---- Used
No used products available
85
Rank 85
Fluval Water Conditioner for Aquariums A8344
(12)
$14.69 New
$14.69 New
---- Used
No used products available
86
Rank 86
API Aqua Essential Water Conditioner 4 Ounce Bottle - Expires 2026
$9.49 New
$9.49 New
---- Used
No used products available
87
Rank 87
Livebearer Salt Brackish Breeding Guppy Molly Scat Fish Aquarium Seachem 300 G
$11.95 New
$11.95 New
---- Used
No used products available
88
Rank 88
Fluval Cycle Biological Enhancer 8.4 Oz Bottle A8349
(2)
$14.99 New
$14.99 New
---- Used
No used products available
89
Rank 89
API Ammo Lock Ammonia Detoxifier 16ounce
(6)
$16.00 New
$16.00 New
---- Used
No used products available
90
Rank 90
ESV Aquatics Bionic 2-part Calcium Buffer System for Aquarium 16oz
(10)
$28.45 New
$28.45 New
---- Used
No used products available
91
Rank 91
048054334566 Kordon Amquel Plus Water Conditioner 16 Ounces
(12)
$15.72 New
$15.72 New
---- Used
No used products available
92
Rank 92
Imagitarium Aquatic Refractometer for Saltwater Aquarium
$22.98 New
$22.98 New
$15.95 Used
$15.95 Used
93
Rank 93
Seachem Laboratories Asm020 Ph Alert Freshwater
(14)
$10.69 New
$10.69 New
---- Used
No used products available
94
Rank 94
Red Sea Reef Foundation a 1kg Powder Calcium Supplement USA
(3)
$33.99 New
$33.99 New
---- Used
No used products available
95
Rank 95
Seachem Flourish Trace Elements 250ml Ship
(2)
$10.89 New
$10.89 New
---- Used
No used products available
96
Rank 96
Brightwell Aquatics Abafer500 Ferrion Liquid Iron Supplement 17oz 500ml
$11.99 New
$11.99 New
---- Used
No used products available
97
Rank 97
Seachem Clarity - 325 ml ASM140
$14.23 New
$14.23 New
---- Used
No used products available
98
Rank 98
Seachem Reef Iodide - 250 Ml Asm556
$11.29 New
$11.29 New
---- Used
No used products available
99
Rank 99
Seachem Reef Fusion 2 500ml Ship
(2)
$13.40 New
$13.40 New
---- Used
No used products available
100
Rank 100
Two Little Fishies AccuraSea 250ml Refractometer Calibration Solution
(1)
$14.99 New
$14.99 New
---- Used
No used products available
