I would stop using the ammo-lock, It is useful for transport but I do not like it in working tanks, it screws up test readings and if left can breakdown after time , causing a spike.
Make sure that there are no dead spots in your substrate, fine sand ofter gets dead pockets if it is left undisturbed.
If you can get it add a tbsp. of sludge from a friends working filters to each of yours, this will boost the BB colony and speed things along.
confirm your readings with a different test kit.
That is all that comes to mind right now.
Make sure that there are no dead spots in your substrate, fine sand ofter gets dead pockets if it is left undisturbed.
If you can get it add a tbsp. of sludge from a friends working filters to each of yours, this will boost the BB colony and speed things along.
confirm your readings with a different test kit.
That is all that comes to mind right now.