I have my fishroom divided into sections. I have a whiteboard where I note water change days, as I realized I was misjudging my timing. I normally do 2 sections a day in winter, because the tap comes out between 4 and 7c, and the hot water gets overwhelmed fast. A sign of Spring is that today, in one run, I was able to do a 30, a 20, a 120 and 2 40 gallons at 25% all in one shot! 4 sections. In a few weeks, I can do the whole room in one morning, instead of having to space it out to 2 of 10 sections a day.
I will buy a screen door next week, and reinforce it against raccoons. That will give me a cross breeze in summer. The room was too hot in summer last year, and I had to use AC. But while the sun heats the highly insulated space (it has windows I need), the temps around here in summer hover around 20 to 23c most days. The harbour ends up full of cruise ships from the south escaping the heat. We have exotic weather, apparently. I just have to get that weather into a fishroom that sat at 26 last summer.
Fun problems to have.