It is probably safe to submerge, but I wouldn't use it for any animal. The problem is that an animal could crawl inside and you couldn't get them back out. It doesn't say that there is any way to take the thing apart. Seems like a bad idea.
It has huge opening, the entire bottom is open.. hard to tell from the pic. I have already purchased this and the Kaiseri were using it as one of their terrestrial hides. The entire bottom of the item is wide open so there's nowhere for them to get stuck. I was more concerned about the risk of the resin or whatever it's made out of leaking into my water.
Well, the resin is apparently "dishwasher safe." That likely means that the resin can withstand the dishwasher and that it's fine to wash it with items that touch food, which says something (i.e., it might be okay to use it). But without knowing exactly what was in the resin, you wont know for sure. Then again, we probably don't know how much leaks out of different plastics that might affect our bodies or those of our animals.Often, things made for reptiles or terrestrial enclosures will have a "do not submerge" note on it. I take it that such a note isn't present.
What the Caudata care articles usually say is "if in doubt, leave it out." That being said, if you can test it by soaking it in a smaller container for a couple of weeks, that might give you more to work with. If it makes the test water smell or discolored, or if it becomes more brittle or pliable than it was when you got it, then you know you probably shouldn't use it.
i highly recommend “buyanaxolotl.com”- ive purchased from them and received a beautiful animal for relatively cheap, in great condition, and excellent shipping precautions. the breeders are a couple living in georgia (i believe, don’t quite remember) and they’re fantastic. sometimes their website contact page doesn’t work, so i’d probably try just emailing them. good luck and happy hunting!