hi guys. Im not a complete beginner, I've done a couple of soil grows and reaped 4-5 oz per (x18) on my last grow. Im going over to Hydro (alien 16 pot xl DWC to be exact) but I've started to look at Nutes and additives. Ive been growing using hesi products....Cant complain, (but have nothing to compare to), but everyone i know says to use Canna Aqua. Ive priced this up and could cost upwards of £300 per cycle....does this sound right to you guys. My DWC system is over 300litres and if this has to be changed out every 7-14 day as well as the plants drinking/sweating something like 30+ litre a day as well, makes for loads of additional expense. The figures I've given you also takes into account only giving 50% of stated doses as well. I also have loads of hesi soil stuff left. basic nutes probably couldn't be used in hydro because of ph etc but what about additives ? anyone got less expensive suggestions? Ta muchly