<< I think MrThompson was going through more than a gallon a day in water. But the aquarium stuff might be safe. Good luck man. I always wanted to build one, but not into the maintenance on it. If you get a water filter and a float valve, you can set it up to autofill so it wouldn't be a hassle. I wouldn't use the Glycol based antifreeze (basically toxic) though. Not even sure you would need to run it (the anti-algae) more than like once a week or so. I also heard in a thread about watercooling that Zinc or some other metal like that works like the anti-algae stuff. They use it in boats or something. So if you do a little research, you might be able to find what kind of metal is used and just put a small block of metal in your cooler and not need to add anything. >>
Dude, you wouldn't believe the trouble I've gone through just to get the parts I need.
For example,
Schedule 40 Thick wall 4" PVC pipe is not the same thing as Thick wall 4" PVC..... the bastard at the store sold me the wrong stuff..... i finally got it worked out though...
I will look into the 'solid' stuff for killing algae... thanks for the idea.... if anyone knows about this for sure, pm me or something.....
zs