1000ppm isn't too strong IMO....not for a plant that size....especially if you've been gradually increasing ppms with growth.... If the plant doesn't react negatively, give it 1k ppms for a week and increase to 1100 the next.... Flush thoroughly if negative affects appear.... If none appear, gradually increase.... 1800ppm is the highest I've run before running into negative affects....but that's just me....

Just my :twocents:....

CGI::::::
CanGroIt Reviewed by CanGroIt on . more nutes or less with blue widow im using 6 x6 rockwool cubes. hand watering drain to waste. 1000w hps in doors. 18 days into flowering. Gh flora. at 1 micro to 2 bloom ratio no grow. 1/4 tea per gallon of powder koolbloom. mixed to 1000 ppm at the present time. do these plants need more ppm or less? more nutes? are they getting burnt? any help much appreciated. im asking because gh's nute calculater says that you should not go over 850ppm. i did that for the first few weeks and just a few days ago went to 1000ppm when i saw Rating: 5