Hey Oldschool. I'm here finally. Sorry to take this long to notice your thread. I'm gonna give it to you straight. The RO water situation has really slowed down their progress. I think next time you grow with the right amount of nutrients (better nutrients) they'll be twice or even triple that size.
I'd recommend this
http://www.plant-magic.co.uk/products/magne-cal-/7/
to take your RO water up to 0.4 EC which is probably 2ml per litre of water.
I would then add this Sensi Grow
Amazon product ASIN B00CFQ4PYOStarting at 1ml per litre of water and increasing that incrementally every time you feed. So 1.0ml per litre first feed, then 1.1ml per litre second feed (feed each time you water). The reason behind this is it increases omsotic pressure on the root system kinda 'forcing' nutrients up into the roots. Like body builder getting incrementally stronger and able to handle heavier weights each session. You want to get that up to 2ml per litre by the time it's just starting to flower. Then from flower switch from Sensi Grow to Sensi Bloom and work your way up to 3ml per litre. When it the plant has small pistal balls add Advanced Nutrients - Big Bud at 2ml per litre.
The other nutrients I would recommend would be Dutch Pro range or if you're on a budget the Plagron range and the BioBizz range are decent too especially paired with their soils.
Right now though you gotta get some cal/mag into the equation ASAP. What RR was saying about spraying them EOD (every other day) with Epsom salts foliar solution and EOD with plain water is bang on. Make sure to drench the plant on top and under the leaves. Add some epsom salts to the water too. I can't remember how much it is, but the container should tell you. Don't over do it though as you will literally be 'salting the earth'.
Also however much of the base nutrient 'Holland Secret' you are using increasing it by a bit right now. Then each time you feed increase it incrementally similarlly to how I described pushing the feed with Sensi.
Finally I never was too keen on that brand of nutrients... I went to check their website to see which bottle of the 3 part had the most magnesium and calcium, so I could tell you, bro add more of that bottle... and this is what their site says..
The secondary elements are equally as important but are only required in smaller quantities. These include:
- potassium (Mg)
- sulphur (S)
- calcium (Ca)
http://www.futureharvest.com/our-products/plantlife-products/holland-secret/
No lie... the dudes can't even suss out that potassium isn't a secondary elements and it's periodic code isnt (Mg)
Anyway if you can figure out which of the three part bottles has the most Mg and Calcium in it (hopefully it's the same bottle) then give it a little extra of that for a wee while. I'd ditch the 3 part though, going on experience I had no better harvests than the two part. Advanced Nutrients Sensi Grow (two part) gave me the best results of anything I've used. Hope all of that helps. I'll be watching
