Yes you are correct. It's27 ppb on my hanna low range. On my red sea no4 pro test kit it reads .04
Nopo-× is a form of carbon dosing.
As to the algae not sure what kind it's thick dark green hairy patches. And o my seems to grow I the more shaded areas. Sides of rocks fund under them.
I have 6 emerald crabs 4 astro snails 1 turbo snail 1 conch snail a stand shifting star fish with a bunch of little kinds of star fish .
1 fox face
1 file fish
2 8 line fairy wrasse
1 yellow fairy
1 tomato clown
1 Darf angle
In a 80g tank
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