So I need to do two, if not three things with the tank.
1) Remove the powerhead before summer time
2) Pull out the undergravel plates
3) Maybe add a CO2 canister
I believe the powerhead is contributing to an 11°F temperature hike. When the house is 68°F, the tank is 79°F. When the house is 72°F, the tank is 83°F. This summer, the house will probably get up to the low 80's, I don't think the fish will survive mid 90's temperature, will they?
Also the powerhead seems to causing a lot of vibration. It's either that or the HOB filter, or maybe the vibration is from both.
I want to get a Eheim 2211 canister. What do people think about that? Should I try attaching it to the undergravel filter first, until I pull out the plates?
Which brings me to the UGF. Should I pull out the plates sooner, rather than later. Every day that passes by, more and more gunk builds up on the bottom, right? All this ticking time bomb stuff has me worried. When I used to have a 55 Gallon with UGF, the tank conditions weren't as volatile. But with a 5.5, things change too fast and there's no time to react. I've read about ways to take out the plates without removing the fish, but what's more stressful, the netting and moving of the fish, or the release of sludge?
I've also added a nice branch of ADA driftwood that goes across most of the tank. And I've added Carpet Moss across the bigger pieces of driftwood. I want to change the substrate from riverbed gravel to soil, so I can have a fully planted substrate.