Ok i try to add ferts per week and will see if there will be any difference.
A question of the subject... I got 2 Kribs lately and my gravel is black sand and has been going on for 9 months. The problem is that they are always moving the sand and have a lot of dirt on my mosses and plants. The filter is not doing a lot of water movement. Should i get another pump maybe i will have more water circulation? Or clean completely the filter?
The problem is that it is difficult to clean plants especially mosses with just siphon.
Thanks a lot for you help.