cheers fella, theres quiet a few with tap roots popping through now but yeah they are lagging behind somewhat. but in the conditions they been kept in im suprised they rooted at all. it was just a test run to see if it worked i havent got room to keep the cuts so they will prob be binned unless...
the most important thing is to get a good match with fan to filter, filters are rated in cfm aswell so if u get a 450 cfm filter you want 450 fan, that way they work efficently and effectivly. rvk fans are really good if there in your price range.
in theory that sounds bang on dura as all nutrients are made available for uptake in hydro at 5.8ph. but as u know theres other factors like strain and how much some plants will take or wont take nutrient wise.