I ordered the test for that since I don’t have it right now I’ll test it as soon as it gets here on Wednesday. Yea it’s pretty new at 6 months old thank you for your input I’ll try getting fertilizer ASAP then. Thanks for the reassurance about the shrimp lol
As long as you stick to the less is more philosophy, as you obviously are, you'll be fine.
You've got enough plants that they'll use up any fertilizer you add to the tank pretty quickly - especially if you dose on the low side. So no real concern for shrimp.
One other thing that I've found helpful for Red Root Floater is to section off part of the tank for them. Not just in a circle as you've done (which is totally fine) but with a section if airline tubing or fishing line running from the back to the front of the tank. When there's more room to spread out, it tends to do a bit better.
Frogbit is the plant I've had the most luck with over the past few decades because it does best with flow. I usually stuff some of it behind my spraybars and allow it to grow out into the flow like this (from an
old tank journal of mine):
As long as mother plants remain anchored, baby plants do well and spread out like crazy in high flow.