Off the top of my head Id say about 3-5 times the size of your pot.....8 gallons. x 3....25 gals of water.....pretty quickly yes......that's the point of flushing. All the water also MUST BE ph correct......between 6.2-6.8 and after flushing it should come out the same from your soil as whatever ph you poured in the top.

With the photos of your plants from 10 days I can now see how quickly they've gone downhill so I think they are WAYYYYYY overnuted as well as abnormal ph. I'd get to flushing them as soon as possible if you can.

The link may give you other ideas to try but I have a pretty good feeling you are in for some work.

Good luck.
Weedhound Reviewed by Weedhound on . Tried many different things but still have sick babies check out the pics please :(Hey everyone u guys have been giving me kickass advice since i signed up here and im slowly learning enough to be able to help other people out...I have one big problem though that i have no idea how to figure out. After about 3 weeks of 24/7 light growth the tops of a couple plants started going really yellow and shrivelled and the bottom leaves were getting brown spots and going yellow after a few days as well...I found out last week that the ph in my water was 8.5!!. so i adjusted it to Rating: 5