RO/DI water

Do we need RO/DI water or even distilled water in order to shrimp?

Personally I felt its not a must especially for shrimp keepers in Singapore because our municipal tap water here has very somewhat very close readings as those to distilled water, except for some heavy metals that were present in our water pipes.

In my early days of shrimping, I used to believe in optimal water conditions for species like caridina. Thus I went all out venturing into buying distilled water from supermarkets to change water for my CRS tank. At first it all works quite well, everything works alright-minimal deaths, shrimps eating like crazy, however as time passes, passion died down and I switched back to direct tap water change where water is only filter by a one stage 1-micron sediment catridge- purpose of this catridge is to filter off large heavy sediments.Initially, slow deaths (dying off one by one) seems inevitable But after a while, shrimps are back in action. Population is still gowing. Unlike previous way, this time I do not place too much calcium rich addictives into the tank.

Therefore I come to conclusion captive-bred shrimps are still able to adapt well to certain environment changes.