So slow.. Especially above to 20 cm.Whats the growth rate in your experience? I have a small one that doesnt seem to grow at all!
I thing growth rate like this;
first 1 year 9 to 12 cm
2. year : 12 to 20 cm ( male/female, domination effects)
than 2-4 cm for a year..
My male argentea ~25cm
same generation female is ~17 cm
I thing they are 3-3.5 years old.