fishgirl53 Posted March 21, 2016 Report Share Posted March 21, 2016 Can anyone tell me please will I need to cement the back of my rock background I have put one coat on the front and sides top and bottom will be doing at least 3 more coats Quote Link to comment Share on other sites More sharing options...
livingart Posted March 21, 2016 Report Share Posted March 21, 2016 No it won't need cementing, i take it you will be siliconing it into the tank? Quote Link to comment Share on other sites More sharing options...
fishgirl53 Posted March 21, 2016 Author Report Share Posted March 21, 2016 I was going to try to get away from doing that and have it holding with the substrate and jamming it against the top brace do you think that will work Quote Link to comment Share on other sites More sharing options...
Shilo Posted March 21, 2016 Report Share Posted March 21, 2016 The substrate can move from under it over time. If its not sized to jam between the bottom of the tank and the top braces (how I did mine) then put some rocks or similar under it instead of a "fluid" substrate like gravel or sand. Disadvantage of jamming: There will be a small gap between the background and back of the tank. This can cause water to stagnate because it will have no movement and if large enough trap fish or snails etc. Because the background will want to float, if gravel / sand is used on the bottom edge a gap will slowly widen at the bottom of the background and any gravel stuck behind it will mean it can't be pushed back without removing all the substrate.Disadvantage of siliconing: Near impossible to remove again in the future without breaking the background. But if you silicon it, you might as well do it right around so water can't seep behind the background. This of course will make it even harder to remove without damage. livingart 1 Quote Link to comment Share on other sites More sharing options...
livingart Posted March 22, 2016 Report Share Posted March 22, 2016 I jammed mine in and siliconed a glass strip in front of base of wall to stop it kicking forward Quote Link to comment Share on other sites More sharing options...
fishgirl53 Posted March 23, 2016 Author Report Share Posted March 23, 2016 Thanks guys for your reply's I will post some pics when finished it is coming along nicely and I think I will silicon it in right around hope I will never have to take it out Quote Link to comment Share on other sites More sharing options...
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