[Tautvilas Laureckis]

I forgot about htis thread.
So after some tests, I made a decision not to use malic acid for parosphromens tanks as pH is not stable. This acid works for the first day, later pH readings grow up.. To keep pH down I use ortophosphoric acid with humic acid extract along with leaves, peat granulate and alder cones at my aquariums. 😉