Im going to build an indoor pond and I have a few questions about the logistics of water changes and what not. So anyway, the setup is a 1000 gallon pond to 2 PVC overflows to 2 separate wet/dry sumps. Would u just turn the pump off, reposition the outtake to a waste receptical, and turn it back on to do a water change? And when refilling what is the best way to do it? Again my guess is to get water flowing from sink at the right temp, use python to get it to the tank, put dechlorinator in tank prior to starting the refill. If there is anything wrong with my ideas or if those of you who have been doing this longer than me have any better suggestions please share! Much appreciated.