AverageWhiteBloke
Member
I've used the API Nitrate for some time on and off just when I'm checking for build ups or if I'm trying to dial in a new tank regime. The best way to look at them is either not really getting a reading or redishh. Forget all the other shades of brown in between they don't mean much. I'm not usually a big fan of testing but they do have their uses, in this case it has detected the OP has been over doing it on the ferts, cross reference that with a bit of querying and you have a result.
Start back on the TNC but at lower levels when nitrates flatten out.
I've also noticed that although the OP's tank is quite densely stocked the majority of the plants appear to be slow growers anyway. Like others have said should just be a case of carrying out water changes and letting the plants burn off the excess nitrate. Ideally while still dosing traces and Mg but at lower levels. Probably going to struggle to get hold of any on Xmas eve unless the OP can quickly grab some Tropica Premium from a Pets @ Home or Maidenhead aquatics before everyone closes.I have used the “double-triple” dose successfully on my heavily planted nano tank, but I would only recommend it for small tanks with a heavy plant mass.
Start back on the TNC but at lower levels when nitrates flatten out.