Think I will transfer to a 240l 48 by 15 by 21 inch tank when I've moved at got the puff stable. I have one empty but not the sort of thing you can throw together during a house move.
BTW the readings in the current tank are ammonia undetectable, same as nitrite and nitrate is about 5ppm. pH is 8.3...
Only took the one shot with flash - didn't want to 'flashy thing' it too much. I can add a chiller somewhere