I am getting very frustrated.  We can't get our PH to stay down.  I have been adding acid for 2 days and I know it is our water.  I can get it down and than it will come back up.  Fish are doing awesome but plants aren't growing well.  I have not added any more plants I have pepper plants and they have not grown or died.   Does any one (TC) have any suggestions for me.  IT is our water but I want…