What is the safest substrate for iguanas to prevent impaction?

As long as the bark pieces are large enough, the chosen substrate should be fine. Small bark pieces could be accidentally ingested though, so care must be taken when feeding. Other options include reptile carpet or a moss/soil mix.

An acceptable substrate would be river rocks or large gravel. Anything smaller could potentially be ingested causing an impaction or obstruction. You could also leave the bottom bare. The basking area doesn't necessarily need substrate. A ramp out of the water leading to a simple platform is acceptable.

Leopard geckos can be very finicky. I probably wouldn’t change his substrate unless he is having problems with the current one. You can attempt to change it but you need to monitor his activity, appetite and attitude closely. I also don’t recommend any sand substrates as they commonly cause intestinal obstruction because they like to eat it. Honestly, the best substrate is an AstroTurf type material because they can’t eat it and it is easy to keep clean, but this can be a big change if he isn’t use to it. I hope this helps!

Although some expert may disagree, as long as Ash isn't ingesting the calcium sand then you can continue to use it. Calcium sand is not the same as play sand which would not be recommended. If you don't want to use calcium sand, consider slate, reptile carpet or even paper towels for easy cleaning.

I agree with the sites claiming sand is dangerous for your beardie, i have seen many beardies with sand impaction, many of them too far gone to be saved, i strongly recommend any of the other alternatives for bedding as they are all safer than sand.

Hello, and thank you for using Petco Pet Education Center, formerly Petcoach. Yes, Clorox is a potent cleaning chemical and, like most cleaners, can be irritating to eyes, skin, and lungs - for both you and your iguana. For this reason, all disinfected surfaces cleaned with bleach (or any other cleaner) should be thoroughly rinsed and allowed to completely dry before coming in contact with Marcela. Hope this helps!

That's terrific news! It is great to read of your frog's recovery. Most keepers will keep a bare bottom tank. This will prevent ingestion of substrate and makes finding food easier for the frogs. It also makes it easier to keep the tank clean. Sand would be fine. If they inadvertently ingest some, it should pass easily. If you decide on gravel or river rock, make sure it it large enough to prevent ingestion.