Was sitting at a beautiful 79 when I got home and Electro looks very happy indeed, very active. I bumped it up to regulate at 82 F already. I think you were right about the extra space.. he seems to be just swimming happily today, like he's doing it cos he can!
Looking forward to the next step forward and doing plants and lights! Just hope the testing part shows everything is ok.
Yes I am doing 50% water change every week, I've put it in in my diary to remind me every Friday is water change day. Was pretty gross when I changed the water today, even though it looked clean you could tell it was gunky, probably from the plant more than anything. I can see why you need a 50% change anyway.