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cheers mucka but it dont take any skill to build one m8 all it is a case of cutting plastic pipe an drilling holes in buckets bro im sure you could do that if it means saving say £300
I know its the old chestnut of diy v shop-bought but I reckon that in the time it takes to build it and iron out inevitable teething problems(esp for less handy people) you could have had an extra weeks growing. That negates most of the savings imo. (I do make a lot of my own stuff though.).
I have no direct experience of IWS but have been doing a lot of research into them and and am on the verge of taking the plunge. They have pros and cons like all systems but I have decided they are the way forward for me. I use aeroflo type system atm.Lucas- the cannabis growers guru- rates them highly and he is rarely too far wrong imo.
Cheers
Papa.
edit. Hydroton pebbles best medium I would say.