Question: How fine sand to use?

[Adam Bruha]

So I've just bought this ''sand'' that was sold to me as sand but it says 'fine gravel' all over it. The particle size is about 0,7 to 1 mm. It's silica sand/gravel and all of the particles are round, almost like really miniature marbles. In hand it feels like rough beach sand, the kind that gets stuck under your fingernails and hurts quite bad. I've put it into my tank with an juvenile axie, about 11 cm (4 and a half inches) and I'm worried if it's going to cause any problems. I'm feeding him with frozen bloodworms and I've put a large feeding bowl for them, so any ingestion of the sand/gravel should be minimal.

 

[hunterwho]

If the particles are fairly round and a millimeter in size, they should be okay; the biggest problem with gravel is the impaction risk, and as long as the sand is small enough to pass through the axolotl's digestive system should they ingest any, you should be fine.