Dave, I love the float valve you have designed and installed in your sump. I was looking at the one thats $15 from Marine Depot, and I think I may order it. Ever since solving my overheating problem by removing the glass tops of the aquarium, ive noticed a huge amount of evaporation and im finding that I need to top up a little bit of fresh RO+DI water every few days. This is getting very annoying. I dont mind tank maintenance, but to top up every couple days is frustrating. I was thinking of running a waterline from my 4 gallon RO resevoir tank right to the float valve. Think it would work ok? I believe the pressure is about 40 psi when the tank is full. I dont mind drilling the side of my sump, and by the looks of that float valve, it should fit okay in my return pump chamber. Any advice would be greatly appreciated. Thanks Dave.
PS- your tank is beautiful
-Dave