slow

[akvamania]

are the h. fossilis normaly a wery slow grower. iv had 2 for son two yers now and i cant see they have put on a inch. they are now about 5 inch. i feed them god too.

 

[wayne the pain]

There is some debate over this but your reason could be this
http://filaman.ifm-geomar.de/summary/SpeciesSummary.php?id=10399