Precision optical ATO unit from Tunze that uses a combination of float switch and optical sensor to maintain water level within ±1mm; a long-standing standard in German reef-keeping.
Where to buy
Affiliate disclosure. Some links on this page are affiliate links — we may earn a commission when you buy through them, at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. Prices and stock are refreshed nightly from each retailer.
