I recommend one garra flavatra[a jumper so keep tank covered] or three otos.

You need phosphate and nitrate for your plants.
Aim for these levels. 1-2ppm phosphate and 5-10ppm NO3

Phosphate and nitrate causing algae is old BS.

Look for KNO3 and KH2PO4. look for chuck gadd's fertilator to help you calculate.

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