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Potassium Deficiency ?

537 Views 0 Replies 1 Participant Last post by  Saltydog33
I have quite a bit of H. Japan in my tank recently it and my hygro giant temple are developing small pinholes and small black dots. Is this a potassium deficiency. I am not injecting co2 i dose according to the Tom Barr method for non co2 tanks which excludes potassium is that what the problem is with these plants?
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