Can iguanas and turles be in the same water tank?

Answers:
Why would you have an iguana in a water tank??? The only semi-aquatic iguana is the rock iguana and they are marine, the only marine aquatic turtles are diamand back terrapins and sea turtles.I think you need to do a whole lot more research into your reptiles needs.

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iguanas are land animals and turtles are water and turtles like to kill peaty much anything in their path because they are very curios and might just wanna take a bite out of the iguana so just keep them separate to be safe

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try this
if you live in a tropical enviroment research and get a in ground pool with non chlorinated water
then put a farily sized tree in it
then put a screen around the whole thing
no water tanks
then go buy an iguana and a couple of turtles
there u go

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No way...if you mean aquatic turtles...they are just that, mostly aquatic except when the come out to bask. iguanas are not aquatic! they are land reptiles. these species are very different and have very different needs.