Mr. Nice Super Silver Haze

Been an organic grower since I first started back in 2008 and was on a hiatus since 2012. Tried to start something again back in 2018 but didn't get too far before having to go abroad. I started these Mr. Nice Super Silver Haze back in November 2021 and popped 5 seeds to try. Never grown in a single rockwool cube before so I have a couple I am experimenting with and the rest are in coco and will be fed with the modified Lucas Formula with Epsom salt. The rockwool plants will just get the modified Lucas Formula without the Epsom salt. What I have experienced on day 14 is that the runoff EC on the rockwool plants have a high EC about double what's being fed. My understanding is that I may be not be irrigating frequently. So I have just drenched the hell out of them with a low EC solution in hopes to replace the nutrients in the cube. Will continue with a low EC until I see a more stable runoff. Possibly the PPFD needs to be higher as the canopy of the plants range around 500-700 umol and will be pushed close to 1000 umol as my lights can do. This grow is also running close to me going abroad again but I think I will be able to postpone that trip for a few weeks. Then all this grow equipment will travel with me so I can set something up over there too... Hopefully.