So sorry about your back!I was hit by a car years ago and have crushed vertebrate and discs in my back and neck. I can barely bend over and if I fall down, I stay down until 4 people lift me back up. I managed to do water changes.
I have told people this before and am repeating it now.
Get a couple of large water containers and put them next to or near the aquarium.
Use a garden hose to fill the containers with tap water. Let the tap run for a few minutes before collecting water.
Add your dechlorinator and aerate the water for a bit before using it. The water can be left overnight to cool down if it's too warm or you can put your frozen water bottles in it to cool it down before using it in the tank.
Use a syphon hose or garden hose to drain the aquarium water out the door.
When you have drained the aquarium, use a small water pump and hose to pump the water into the aquarium from the holding buckets.
It's that simple. No major lifting. No major bending over. No sloshing buckets of water through the house. Just use hoses, water pump and buckets, and you won't have to stress your back.
And like Byron said, stop stuffing around with the tank temperature.
That's not my fish tank if that's what your thinkingon that fish tank/ room temperature thing - that is true to the extent of you don't have too much agitation. I keep some comet goldfish and shubunkin goldfish in a stock tank in my greenhouse, greenhouse today at 3 pm was 108, tank temp 82. One pump, multiple drops off wide ledges (that have plants growing on them). I don't use ice to cool water. I move water thru air or air thru water with an airstone
So the AC actually keeps the water temp down?Rocky, in the interests of full disclosure I must confess I have used the tank cooling methods I outlined only for my axotles. As for the fish tanks (10) I use the Rocky Central AC System. Seriously, I kid you not. When Rocky, my French Bulldog, begins to pant due to warm weather, I flip on the house central AC. This happens between