Water Problem...?

So I have finally started my grow, seeds germinated and starting to grow....

I want to give them the best possible, so I was going to buy a RO water system or other type of water distilation system. But they are all so expensive I do not think I can afford one at the moment...

So I want to know is it ok to use tap water that I will leave out over night? I havent had a chance to check the PH but if its higher or lower im hoping a bit of PH up or down will do the trick....

So it tap water ok? Or is there some cheap system I can use or other method? Please help.

Thanks in advance....

Tap water is fine. It's a weed. It'll make do...

Great! I hope it is ok, its just so many people emphasize the use of distilled water.... I didnt want to give my plants something bad for them...

Thanks for your advice...

Are there no cheap distilliation products available? Or a home made method?

I personally just use water that's been boiled in a kettle and left to cool down, I don't run any PH tests on it. I just give it to the ladies and they seem to like it. Quite alot.

Ok thats what I wanted to do, but read some place that it doesnt do much, but I will boil and then leave the water out over night just to be sure I think....

thanks for your help.