Nitrate levels for discus

[Bad Inferno]

OK..I probably know I am overstocked in my tank however what are tolerable levels of Nitrate before discus are really stressed

200 litres
5 x large discus 8"
4 babies which are fast growing now 2"

Ammonia is 0 however Nitrate is 40+ difficult to read when over 40+ as its all just shades of reds...

rob

[taksan]

Less then 10 is a reasonably safe level

You need to do larger and more frequent water changes

[Ben]

It’s as simple as that! increase frequency and volume of water changes per week.