Hello. I have had a aquariums for 20 years and am currently considering a new 125 gallon for fresh water. I received an education regarding filter systems yesterday and would like the input from others. I currently have a 75 gallon with an under gravel filter, air pump for the UGF, and a foam/charcoal/ammonia over the back of the tank waterfall type filter. I am not a fan of the power head system due to they create too much heat (I live in a hot summer environment). I was planning on another UGF with a supplemental filter system; what is the current thought on UGFs and are they currently recommended or not? I have looked at canister filters to supplement the UGF and have learned they make drilled tanks for the canister system. Any thoughts on supplemental systems, no UGF and other filter only, or any other advice from people more up to date than I?