GreshamH said:http://www.genesisreefsystems.com/
http://www.genesisreefsystems.com/products.php?cat=9
I see people taking about the above, but that is all...
iani said:First you don't want to use anything with brass with salt water. Also the drain and fill hose will not have the same flow rates. 1 min will not be the same for both.
SoulFish said:seem you could just use two $20 home depot timed sprinkler connections. One is set to drain for 1 minute once a week and the other set to fill once a week for one minute, and runs directly after the drain one shuts off. Just use standard hose fittings and runs on AA batteries and cost $40 total.
Basically the timers just open the valve to either drain of gravity fill. And time is how you measure the fill or drain rate.
Orbit Water Timmer
GreshamH said:See I knew it. I ran out and bought ten of them!!