if you let your local tapwater sit in ajug or resivour overnite it will be fairly close to 5.5 also it doesnt hurt to put a tablespoon of bleach or hydrogen peroxide in you germination water will kill any fungis or mould that could be present will not harm seed just rinse after you soak them overnite good luck bro I also use the 318 rainforest exelent machine put 1tablespoon hydrogen peroxide 35% food grade in your 17 gallon holding tank really promotes root growth you wont fucking believe it looks like spaghetti snow white and about 14 inches long big buds check supersonic aerophonic out she will explain all much better than I its a cannibis culture article I stumbled on researching the best ways to grow keep your ph 5.5-5.8 you,ll love the 318 ceck you later man