Optical Auto Top Up$99.99
DRY GOODS
Optical Auto Top Up
$99.99
Only 3 left in stock
Overnight shipping$29 Florida · $49 out of state · FREE on orders $299+
Free local pickupGrab it at our Gainesville, FL store. Choose Store Pickup at checkout.
Loved by reefers: 175+ Google reviews
★★★★★ Michael M., verified customer ★★★★★ Brett F., Google review ★★★★★ Angie E., Google review
"My corals all showed up in perfect condition. Some of the best in the business."
"A top notch operation that sets the bar pretty high. Killer prices, expedited and careful delivery."
"Customer service is top notch. Alan knows his stuff!"
An optical auto top-off (ATO) system that uses an optical sensor to keep your water level steady by adding fresh water as it evaporates.
Why We Use It
Stable salinity means happier fish and corals, and no more daily manual top-offs.
Use: Mount the sensor at your target water level and use only RO/DI water in the reservoir.
