It's me again!
I'm halfway through moving my fish into the new tank. I've reused the filter media and dunked half a bottle of safe start in and let it run for an hour. I've used a master test kit to test if the Nitrates have survived, and I'm getting a result like the pic below. I gather I want it to go red which it is at the top and bottom, but not in the middle.
Is this normal or have I screwed it up?
I'm halfway through moving my fish into the new tank. I've reused the filter media and dunked half a bottle of safe start in and let it run for an hour. I've used a master test kit to test if the Nitrates have survived, and I'm getting a result like the pic below. I gather I want it to go red which it is at the top and bottom, but not in the middle.
Is this normal or have I screwed it up?