I have found the for ph Vita Grow brand has no coloring added as well as Mad Farmer brand but the GH Ph products work fine as well. They just color theirs so you don't use the wrong one. Earth Juice Natural crystallized Ph products are all organic.

When I used lemon juice from the tree in the backyard and backing soda I adjusted my Ph 4 to 6 times a day. I tried the CO² tank for Ph control and that worked but only one way.

When I switched to commercial pH products I only need to adjust the pH once or maybe twice a day. The commercial pH products seam to work better with the commercial nutrients then home remedies.