Quote Originally Posted by sepgundamrg View Post
I had no idea that ro-di water was bad for amphibians, thankfully I use de-chlorinated tap water for them(seachem prime as my conditioner)

I do know that ro-di(reverse osmosis de-ionized) water does not cause problems with fish, and is actually recommended because the parameters will always be the same. Keeps with more sensitive fish such as discus even have ro-di filters in their homes.
Very true, however, keep in mind that the requirements of fish are very different from amphibians in all aspects. Water chemistry that is appropriate for soft water fish like discus, or hard water fish like cichlids can be very harmful to both anura and caudates alike. Also, in the case of many fish, the substrate used and the method of treating the water is what makes it suitable for the fish.