I find AK47 stronger and more resinous than the skunk special. But maybe AK is too strong, can't smoke it except before sleeping. Skunk Special is a good compromise between yield ( awesome ) and strength ( B+, AK would be A+ ). Do you use a special horticole 250 HPS light ? far better results with it compared too a normal bulb. How is the grape fruit compared to AK? Thanks for the info about RO water, my TDS of tap water is EC 0.25 without nothing added in it. PH is 7. Is it hard water ?
Fhydro