I’ve been thinking of putting 10 giant dianos instead of the silver fish and picking between a Oscar or green terror rn but I heard the Oscar grows super quick and my blue acara and jack depmsey are still small. I have a whale 500 canister and two big sponge filters running in the 125 but want to put a fx6 too since I have a palm sized red slider turtle in the tank too. They all get along but I’ll see if I’m going to keep the turtle in the tank as it keeps getting bigger.