I guess I could just test it but I was wondering If I mix my Ro water with 5ml a gallon cal and .7 ph up will it be good say 7 hours later to water with or will the Ph change on me. Sealed threaded container.
Only going off of what I’ve read just phd water can change in an hour or two. Add nutes more likely to change. But I’d get a second opinion.
thanks. this is kinda what I figured. Sometimes when mixing up my water I do it all at once and the last jug ph will change .5 in an hour if I am distracted in my watering.
Mix just before using. let sit 15 min. Test pH. Adjust if necessary. Let sit. Test again. Do not add up AND down. If you overshoot start over.
Thanks. I made the up/down mistake previously. I have quit doing that. I just dump it now If I go over. However I have logged how much phUP it takes now for the amount of nutrients on schedule or just Ro and cal per gallon to achieve the proper ph. Some times it just a hair off but mostly right on point.
From personal experience. I mixed my Ro water with calmag and nuets and capped the jug and ph did not change much maybe .01. Now I have left it out uncapped and it changed. The best advice I have is trial and error. Mix a gallon with cal and just see what happens. Happy growing friend!