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.
Weedhound Reviewed by Weedhound on . reverse osmosis machine help asap appreciate all the help 5 sk no1 and 5 mk from seeds soil 13,5L pot(60%copmst40%perlite ans some garden lime] 7 weeks in to flowring 2 or 3 more weeks to go tap water ph 7.5 adjust to 6,5 using ph down and the ppm of the tap water is 1500. been feed with bio grow/bloom 1/2 dose NOW THE PROBLEM every thing was ok till 2 days ago when i water the girls 1 liter each of pure water using reverse osmosis machine (ppm 0 and ph 7 adjusted to 6.5 using ph down)only 1 L of water and after 24hrs Rating: 5