Yeah I was going to say same thing. Drop it even lower if you want. a drop every 2 seconds. That’s what I started with for 2 weeks. Think I did 1 drop a second after 2 weeks. This is a slow process that you really can’t speed up. Test nitrite after a week, then every couple days after. You will see it spike, then go down slowly. Once it’s 0 then start testing for nitrates. This will take a long timeSlow your drip down and let it sit for a week before increasing. 1 drop per second to start. After a week 2 drops per second.
I wouldn't feed it anything. You will just suffer die off when you are not supplying additional nitrates.