i have heard many people use Great Stuff expanding foam for their backgrounds but which kind do you use? there seems to be several (pond&stone, big gap filler, gaps and cracks etc...), if i can't find that particular kind, are there any others that will work well?
also, i know lots of people cover the foam in eco earth/coco fiber, but when do you do this? do you just press it on while the foam is still wet or silicone it on after?
and one last question about what i should use for subsrate. i have heard of orchid bark, sphagnum moss, earth etc. what is the best combination of them? do you put it down in layers or mix it all together? the tank is a 75g, so i'm looking for options that won't cost the earth.
also, i know lots of people cover the foam in eco earth/coco fiber, but when do you do this? do you just press it on while the foam is still wet or silicone it on after?
and one last question about what i should use for subsrate. i have heard of orchid bark, sphagnum moss, earth etc. what is the best combination of them? do you put it down in layers or mix it all together? the tank is a 75g, so i'm looking for options that won't cost the earth.