new poster here. had fish room some 30 years ago with 40 breeder tanks for cichlids. now getting back into hobby. just purchase 125 gallon with two corner overflows, which filtration system to use? back in the day had all corner bubble ups or undergravel filters or powerful promaster hang on back with siphon tubes. canisters had just started coming out.

I wanted to go canister but do not want heater on the inside of the tank, the more research I do I like the biological filtration as well.

wet dry with bio balls or sump refugium? it is confusing as reading forums online speak of other types mainly for saltwater. At first I really thought I was behind the curve

my plan is dry start method with a dozen plants, large diftwood and few small fish to get parameters in order