Too much of a good thing??
I reccently connected my lily pool to a 150 gallon aquarium where they share a circulation system. I built an automatic purge system that collects rainwater and forces it under the gravel in the tank only.
We have been in a drought until recently so the system has not really been tested.. but during a 3 inch rain I estimate that around 700 gallons of water went through the tank in less than an hour!! Is this too much water change?? Everthing looks great and the fish seem to be fine but we have got as much as 30 inches of rain so 700 gallons would only be a drop in the bucket lol Have heard of "open" systems where water is continuously flowing but have never managed one and of course this system depends on rainfall. Any ideas?? gary