Rock Supports For Tank Base.

[Tag2008]

Hi Guys,

Id like to make a nice big rock cave or feature but am concerned about the glass base getting a knock from a rock as the substrate is sand and am sure the rocks will sink in it....

Ive looked on the net and found an american bloke saying he used ' egg crate from his local DIY store ' under the substrate to help..I dont think he means like egg boxes we buy eggs in does he??

I looked in B&Q online for some plastic grid in sheets or something to lay under my substrate as a rock support but cant seem to see anything or maybe I cant find anything because Im searching for the wrong things??

Anyways what do you guys use under rocks and where do you get it in the UK.

Thanks again

 

[squeakytoy]

why not try coating the base with silicone? Use a notched trowel, or something similar, and lay a bead around the edges, or even the whole base if you wanted to. Then flip the thing over onto a sheet of waxpaper, press until you have it as a thin layer and wait for it to dry!

 

[Colin_T]

The egg crate is similar to plastic milk crates or bread trays, (the things that a bakery uses to hold 30 loaves of bread when they deliver them to shops). You can also use the plastic grid stuff they use in ceilings under skylights.