Great ideas ! Thanks

I looked into to several kitchen cabinet type places.
I realized as well .......creating side rails ( for mounting ) is really the only option.

However, cost and practicality is an issue. It may be less costly to simply buy exo- terras on sale with front opening doors
Drill them/ remove the screen / replace with glass ---- done ! So simple.

Plus I drill my tanks. Sliding the tubing/ that is attached to the tanks is a fly in the ointment

I can always put these top opening grow-outs ( aquariums) on the top shelves ! That's where keep the 2 1/2 gallon temps for the really young tads. Being just 5"2 -- I need a bench to reach them ! That's no fun either. The little tanks are light enough to take down.

Don't know.

Let's keep thinking.