Fluval Flex 15g bracket to hold lid/light while working in the tank.

thingiverse

Created this bracket to hold the lid of the tank while I have my hands in it. its offset makes it easier to have it out of the way while still hold the lid quite safely. I used black pla printed at 4 walls and 40% infill I found it was strong enough while not wasting filament. I printed it standing up with a brim stuck to it. zero supports needed. You could go full wall if you wanted it even stiffer. printed on a 300x300 bed in a 45deg angle to make it fit.