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fair enough, what i was trying to say was if all of the variables met high standards, what yield is possible? i know that general skill, strain, time, method and any problems going wrong during the grow can be a big difference but given that my technique, strain, time taken about 2 months...

Would a RVK150-A1 - 420m3/hour be good enough for the job? whats the best possible yield if i have a high yielding strain?

i am thinking of getting a 600w hps light for my grow tent. first of all i was wondering if a 1m x 1m wide and 2m high tent would be big enough for this? i do know that many things depend on what the overall yield is on a plant, so i would like some tips on getting the best yield possible...

With my setup, what could i do to ensure i can get the maximum yield possible for example what would be the best growing technique for a 250w light setup (1mx1m) in soil (SOG, SCROG or one big plant?). Would nutrients have a part to play in the yield, if so recommended nute brands? (currently...

i'm just curious as to what yields (dry weight) you 250w growers have managed to yield before and what sort of setup did you have? e.g. soil, nutes, growing time, techniques, seed strain and any more factors you can think of that might have contributed towards the final yield? would be...

Has anybody else heard about this?

so my problem is obviously not magnesium if the ph is too high... can a ph thats too high cause magnesium deficiency type symptoms?

can ph levels getting too high cause a deficiency ro a lockout of magnesium? i'm a little confused as a chart i have showing when magnesium is unavailable shows that magnesium is only unavailable under 6.5. however i got signs of mag. deficiency and my ph is waay too high. could this cause a...

to me, images 3 and 6 look interesting, the damage to this leaf has deteriorated... i think that picture might be the most help to you as the symptoms will be more obvious. this leaf was in the medium growth, and the damage isnt so bad in the medium-new growth. is this damage anything to worry...

i'm using 81% phosphoric acid bought from a grow shop.. it says its for hydro. a couple of drops of the stuff in 2L brings the ph down close enough for me, is that safe enough?

a pic of the damaged leaves or the pot? lol will post a picture up in a minute...

no, ive had this problem for a while now, but while i've been having these problems ive repotted into a new pot. the root system is ridiculously big, a bit too big i think. i've got a 45cm wide x 35cm high pot and its due another transplant soon too.

New-medium growth with rusty leaves and some twisted. highly doubt its magnesium/calcium because the nutes already have that in and have been using the same nutes for a while now with no deficiencies at all! have already tried flushing then gradually giving nutes again with no luck

i've never even had to test or adjust ph up until now for some strange reason, having problems with PH due to the water being around about 7.5..

anybody???

The title pretty much says it all... can you use phosphoric acid for soil PH down? This is the only PH down i have and am not sure if i can use it in soil?

Brilliant, cheers for that mate! I'm using organic nutes anyway. So i can correct the water first, then add the nutes as it shouldnt affect the PH? Thanks for all of the help with this, and hopefully lowering my PH should solve my problems from now on!

i'm thinking it could be locking out the manganese. and thats exactly the problem i've got; is checking the ph once the nutes have been added. anyone got any suggestions?

Sorry i think i have realised my problem... Manganese. it can be locked out when the PH is too high. does anybody aggree that it could be this? all that i need to solve now is checking the ph is correct with coloured nutrients