They're looking really good.....yes, sounds like you need to replace your probe. You can buy some very inexpensive ph testers at your pet store for aquariums (NO fish ph adjusters....only testers for fish ok) and keep them as a quick back up and calibration set.

Oh yeah, there's ALWAYS something else to buy. :thumbsup: Have fun.

PS...keep your ppms up to the correct level and the plants will grow faster and be happier. (when you add water add your nutes and adjust ph to it first)
Weedhound Reviewed by Weedhound on . I'm trying to defy the odds...but My friend found some really good "dro" there was a couple of seeds in it,she decided to throw them in some dirt,a week later she was amazed because they started to grow,She gave me 3 plants,one died.I grew hydro before and I noticed a very fast growth rate compared to soil,I took the plants out of the dirt and I transplanted them to my bubbler,in the meantime I sprouted 7 other seeds that I had.Now I have nine plants in a 3 gallon bubbler(the plants that she gave me are about 4 weeks,my Rating: 5