A pleco cave may be OK at a few inches longer than the fish, because plecos create current by beating their fins, especially fi there are eggs in the cave. However any time I tried a pleco in my 2400 gallon pond outside, they would force their way inside the rolled up liner in the corners and become trapped. Anoxia might have been a factor because the inintentional "cave" was up to two feet long and very constricted.
The silicone and gravel, sand, rocks, driftwood chunks, plastic plants, and sea shells idea has been around a long time.
I may be in the minority but to me the results of these experiments always look more intrusive and phoney than a simple plastic pipe. As unnatural and artificial as that pipe may be, decorating it makes me wish it was a plain pipe. Sort like a pig with a wig.
What I do is drill holes in rocks with a concrete drill bit or in driftwood with an appropriate bit. To make those look a little more natural, I may chip the opening with an old screwdriver or chisel.
The silicone and gravel, sand, rocks, driftwood chunks, plastic plants, and sea shells idea has been around a long time.
I may be in the minority but to me the results of these experiments always look more intrusive and phoney than a simple plastic pipe. As unnatural and artificial as that pipe may be, decorating it makes me wish it was a plain pipe. Sort like a pig with a wig.What I do is drill holes in rocks with a concrete drill bit or in driftwood with an appropriate bit. To make those look a little more natural, I may chip the opening with an old screwdriver or chisel.
