As I brought more tanks online...I needed to reduce maintenance time and reduce CO2 connections (my regulator solenoid valve set up has 6 bubble counters)...I use a 1" id U tube between two identical size tanks ( I have (2) dual 20L, dual 20H, dual 29, dual 40Br). One canister filter, one CO2 ISTA "reactor" on outlet , one heater per dual tank. I run a T5 HO light strip above the dual tanks. Now I check the 3 water parameters (GH, NO3, PO4) 5 times/wk vs 10 or 15 tests vs 30...that saved a lot of time. My tanks are amazon biotope, so I got two 55 gal barrels and made a plexiglass perforated plate that I put mesh over in one barrel and then circulated the water between the two barrels. I put peat moss in the barrel with the perf plate/mesh and a heater in the barrel with the pump. I put water heater insulation blanket on both tanks. I have an RO system on a float switch on the pump barrel (that stopped me forgetting to turn off the RO and from having to hang around to turn it off when full) Now I have 100 gal of 80F pH 6.3 ish RO slightly brown tinted "amazon" water that has a tee in the circulation loop that I run overhead and can top off a tank in a couple min and makes water changes way faster...Next maintenance reducing project is to run pvc along the floor to the sump pump so that once I am done siphoning out the "crap" I can run the clear water to the pvc drain line and not haul buckets to the sink.
I also have several different types of floating plants...and I think this reduces the surface area for evaporation somewhat, calms down the hatchets and pencils. The pencils like to hunt around them and grab the wingless fruit flies off of them.