Aquarium Meters & Controllers
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- Brand New · Neptune$210.00or Best Offer$9.58 shipping
- COOL TOUCH and QUIET OPERATION SOLENOID! ON SALE NOW!!Brand New · Aquatek$45.99Free shipping4,217 sold
- $19.54Was: $22.99was - US $22.99or Best OfferFree shipping123 sold
- $23.79Was: $27.99was - US $27.99or Best OfferFree shipping146 sold
Pre-Owned · Neptune$229.99Free shipping9 watching- Pre-Owned · Neptune Systems$159.00Free shipping11 watching
- $6.29 to $16.99Free shipping1,430 sold
- Pre-Owned · Neptune Systems$229.99Free shipping
- Pre-Owned · Neptune Systems$200.00or Best Offer$41.70 shipping
- Brand New · Unbranded$1.99Free shipping4,984 sold
- Brand New · Neptune Systems$575.00or Best Offer$37.85 shippingOnly 1 left!
- Pre-Owned · Neptune$209.99Free shipping3 watching
- Pre-Owned · Neptune$140.00$16.58 shipping1 bid3d 12h
- $200.00Free shipping
- Pre-Owned · Red Sea$500.00or Best Offer$41.70 shipping
- Pre-Owned$400.00or Best Offer$16.58 shipping
- Brand New · Tunze$89.99Free shipping
- Brand New · Tunze$229.99Free shipping
- Brand New · Unbranded$1.95Free shipping699 sold
- Pre-Owned · Neptune Systems$69.99Free shipping4 watching
- Brand New · Unbranded$9.89 to $13.76Was: $10.99was - US $10.99Free shipping
- Pre-Owned · Neptune Systems$499.99Free shipping
- $8.99Free shipping375 sold
- Pre-Owned · Neptune Systems$210.00or Best Offer$41.70 shipping
- Brand New · Unbranded$1.99 to $4.99Free shipping453 sold
- Brand New · Neptune Systems$65.99Free shipping21 watching
- Brand New · Tunze$149.99Free shipping
- Pre-Owned · Neptune Systems$54.99Free shipping
- $126.45or Best Offer
- $54.99Free shipping25 sold
- $150.00or Best Offer$12.75 shipping
- Pre-Owned · Neptune$199.99Free shipping
- Pre-Owned · Neptune Systems$24.99Free shipping60 sold
- Pre-Owned · Neptune$229.99Free shipping
- $7.99Free shipping
- Brand New · Neptune Systems$844.99Free shipping
- $8.13Free shipping394 sold
- Brand New · Unbranded$2.50Free shipping
- Pre-Owned · Neptune$150.00$25.00 shipping0 bids2d 10h
- $150.00or Best Offer$6.97 shipping
- Brand New · Unbranded$12.18Was: $12.96was - US $12.96or Best OfferFree shipping129 sold
- Brand New · Neptune Systems$599.99Free shippingOnly 1 left!
- $99.99Free shipping
- $32.51Free shipping
- Pre-Owned · Neptune Systems$39.99Free shipping
- Pre-Owned · Neptune Systems$78.99$11.07 shipping
- Pre-Owned · Neptune Systems$360.00or Best Offer$16.58 shipping
- $9.99Free shipping
- Brand New · Neptune$29.99Free shipping
- Pre-Owned · Neptune Systems$122.50$23.90 shipping2 bids4d 6h
- $19.99 to $59.99Free shipping
- Pre-Owned · Neptune$29.95Free shipping7 watching
- Pre-Owned · Neptune Systems$49.99Free shipping
- $9.99Free shipping
- Pre-Owned · Neptune Systems$30.00or Best Offer$4.49 shipping
- Pre-Owned · Neptune Systems$39.99Free shipping
- Pre-Owned · Neptune Systems$35.00$8.19 shipping
- $7.25Free shipping45 sold
- $139.79or Best Offer$9.95 shipping
- Pre-Owned · Neptune$650.00or Best Offer$15.40 shipping
Best selling
- $65.99 New$50.00 Used
Top rated
- 100% agree - Would recommend$29.99 New
- 100% agree - Would recommend$7.95 New
- 83% agree - Would recommend$10.10 New
Review highlights
Recommended by our customersCan't buy China products anymore
By krislewis
Sure I can buy a pH meter from China for 1/2 the price, but the reliability of the electronics, and constant failure of... see all reviews
Verified PurchaseGreat add-on to a standard RO system.
By lian8909-ya3xwc71au
Just installed and added to a brand new "Express Water" RO system. Works great so far. Automatic switch-off function is ... see all reviews
Verified PurchaseAccurate temperture
By wupt9166
I have 2 of these in use and they operate very well. accurately, stays in place, doesn't fall off and are easy to read. ... see all reviews
Verified PurchaseEasy to use, easy to read
By abec_be_rtepmd
I was happy that I got this particular one. It was easy to understand and use. see all reviews
Verified PurchaseTimer works fine
By robert463modeltrains
Fairly easy to set, just that the little tabs are REALLY tiny and it's easy to press more than 1 at a time. Aside from t... see all reviews
Verified Purchase
