Tried to use the thin sheet of Lucite, siliconed to the bottom of the new empty tank, 90g. Put the silicone along the perimeter, and the sheet at the top op this, pressed to embed. Put books on the top as a weight.
All was good - even with partial filling with freshwater. But after setting the tank will all, the air bubbles, big layer of air, trapped in this sandwich, caused the partial disconnection the Lucite sheet, and some water came inside. Not good, teared it off.
Silicone was impossible to remove in minute, with the LR waiting in the buckets and the fish, still in the tank.
Put starboard over this, trying to keep within this silicone.
Still a lot of debris are collected under the starboard.