Ok,its an indoor grow,400 watt cool tube,12/12,im using the cool tube vertical,and growing my plants verticaly(space wise),itsa neat little grow box,1.5m x 1.5m x 2m height,ive an exhaust(4`),an intake(4`),and a circulation fan,im using home made co2, Nutes, im using "plagron" terra bloom,pk 13-14,im using a low dose of "big bud"(for soiless mix)im compost an perlite,is this a no no?? i water every 5-6 days,depending if it needs it or not,the temperature has been dropping here in ireland and weve no heating in the house at the minute,the temp in the box drops to about 55`F(light off)lights on 75-80`F,now that im typing im thinking maybe that bud boost??the bud have seem to bulk up in the last couple o days but the leaves are in bits,!!