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So im not even 100% sure this is a problem yet but im confused about the ppm reading im getting. When i add general hydroponics ph down (powder) to my water it raises my ppm reading. I have been reading on here that other people have the same issue. Im wondering how i am to follow any type...

I am running a GE 400w mh bulb. Not sure on the exact type. Its in some type of old ballast. Ill have pictures soon. My room is 5x5x8 with a shower that is 3x3x7. I have my light hanging from a homemade frame in the shower (the fixture is very heavy). The room is getting up to 95 at times and...