First of all, greetings everyone, I`m a new member, but is never to late...

In my case, pearling is much more intensive, after water change, but my TAP water has pH 7.5-7.6, kH readings are about 6, so i have to tnink, that my tap water has poor CO2 levels.

I use PMDD, with some PO4, K2so4, KNO3, MgSO4 x 7H2O, and trace elements, so i think that nutrients are not problem for better pearling.

In my aquarium i have pressurized CO2 sistem, DIY reaktor with powerhead and i have pushed CO2 to about 40mg/l, light is 2x MH 150W for some 350 litres, but i have much better pearling after water change. I think that CO2 is not limit in my aquarium, or my calculations are not correct, or plant can collect carbon better from tap water?

Great site...Keep up the good work !!!