yeh i got my fish safe silicone at bunnings i think it was yeh $8-$10 for a tube, my issue is Baby brain mixed with house move and at least 6 different ets of handds i can no longer find said tube or chalking gun >.<
Ness whats the mess you used? im currently using a craft mesh but its not very tall. And i get the display folders that the spin swings off piviot at top, i pull it off and find the mesh slides into it very easily, being white its hard to see through and if needed i use the plastic off the folder to card them (slid inbeside the mesh)
havent had any issues with water parm's going crazy and 2 fish have lived this way quite happily for several months (in 20 litre tanks, filtered and heaters)