Yes, sounds like a def. If you use RO water you should also use CalMag+ to help replace lost mineral like calcium etc that the RO system takes out. Tap water usually has these minerals already.


Why did you switch over if they were doing well on your regular water? Or was there an issue?

PS Do you mean your tap water is at 150ppm? Never heard of tap water at 1500.

Also what is your humidity level? Fungus problems seem to be going around this time of year.