First grow

I used emerald harvest at 1/8 of recommended on chart. Had a brown slime that caused root rot. After a few days of going over everything, it was all right. Ph 5.8-6.3 R/O water starting at 5 ppm zero light in res other than tube on side. The emerald goddess tonic ended up being the problem. I pulled it out and added in cal-mag, everything took off! Before adding nutes I did a four day flush. I used h2o2 at 3% and sprayed off the roots then made an h2o2 bath at 2% soaked for 4 days and added nutes straight in.