Rock caves

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rdd1952

Swim with the Fishes
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I have bought some zebra rock (granite) and slate to make a nice cave or maybe two. Is it best to just stack them up in the tank and run the risk of knocking them over when I vacuum or should I get some aquarium sealant and glue them together? Also, how long should I boil them before putting them in the tank?
 
.Personally I'd glue the rocks together. When you start to clean the tank most likely the fish will be hiding under or in between the rocks. I 'glued' a bunch of slate together to go in with my Oscars and Pacus. I used an aquarium glue called "HoldFast" It was around $12 at Fintastic (probably cheaper at other stores). It came as a (approx) 8 inch cylinder in a green package. Ya just break off a piece, roll it in your fingers, mash it into where you want it then put the other rock against it. Real easy to work with, feels icky but cleans up easily. It's not a runny glue like wood glue, etc, instead it's more of a paste/clay type substance
 
I'll see if I can find some of that. I have another problem now. I esperimented with what I bought and have a nice 2 tiered cave/arch set up. I know once I take it down to boil the rocks, I won't be able to put it back together again. Sounds like a nursery rhyme doesn't it.
 
I would recomend glue. I neva done it, but id rather know it would be stable. Try and find the same non-toxic type glue ppl use to glue the glass pains of the tanks together. Silicon.

EDIT: draw a picture of the rocks like your have them, or right on them, or boil them one at a time so you know where to put them back. Thats easily overcome! :)
 
I would never glue them, and I use a ton of rocks. It's not difficult to create a stable formation by simply stacking them. Once settled these heavy rocks are not going anywhere. I'd hate not to be able to rearrange them.

For a stable base, place the rocks on the bottom of the tank and not on the substrate.
 

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