It’s mounted onto a frame bolted to the back of the tank.Nice, is this mounted on the back wall? Would you show more of the actual mounting mechanism?
the unit used is a tv lifter as used to hide a tv in the end of a bed.
then a simple frame made with T slot aluminium.
one of these was used
AV4-LF1000 Flat Screen Lifting Mechanism 1000mm Lift / Travel
LF1000 TS1000 Flat Screen TV Lifting Mechanism for lcd and plasma screens rf remote control, 1000mm of motorised movement. Free Delivery
www.av4home.co.uk
This might show it better.