We are going to get a 1000 gal pond or a 1250 gal pond for our group of channel cats. With this size of a pond, I was thinking about adding more of a stock then 8 channel cats. I was thinking a RTC but was wondering if I could also keep a Tiger shovelnose as well. If the stock was kept at an RTC, a Tiger shovelnose, and my group of 8 channels would it be over stocked? Also was planning to filter this thing with canisters, but was wondering how people normally oxygenate and heat these ponds?