Well i finsihed it except for the back strip (until i find it) and added the plexiglass for water proofing since it more or less touches the top of the filter.
I tested my water again today
Nitrite: 0.1-0.3 depending on the lighting..
Nitrate: 5 (maybe a bit lighter so could be lower)
If i was to do a 50% water change do you think it would be okay to add a few of them in?