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Hello people, picked up some aquarium ph down yesterday and am not to sure if I can use it or not. Its made by API Aquarium Pharmaceuticals, and it says it contains sulfuric acid. Also I am growing in compost, some people say not to bother with pH adjusting in compost, is this right? Thanks

Hello all, just got myself a mesh panel for my scrog screen. The gaps are 1", but I have cut parts out to make it 2" as that is what I have read it should be. The gaps just seem a bit big though, my screen is only 13" by 13", although I think I will stick to the 2" gaps. Really all I would like...