Pet stores and hydro stores both carry very cheap liquid ph testers that will work fine for you....that's all you need really. Keep in mind however, that you should only use ph TESTERS for aquariums and not the ph ADJUSTERS for fish....they have different ingredients than the ph up and ph down made for plants.

Good luck.
Weedhound Reviewed by Weedhound on . Water Bead Burn? Nutrient Burn? Deficiency? Ive checked the faq, and a few others and couldn't find exactly what problem this is. Can anyone spot it? I'm currently using fox farm ocean forest soil, three 23watt and one 42watt CFL's and my plants are two weeks old. It just recently started on the first set of leaves, not the round seedling ones, but I think they are the 'first true leaves'. Anyways, It seems to be getting worse and looks like its spreading to the next set? Is this normal? Rating: 5