High nitrate in my 55 gallon tank

butterflyx8i8x

yes my PH is good.

Pasfur

No, no. There is really no such thing as pH being "good". The value of pH at any given moment is only a reflection of that exact moment in time. pH bounces within a range over the course of a day, and the range that it bounces within is impacted largely by alkalinity.

So, if you test for pH at 8.2, you have no way of knowing if 8.2 is the maximum value that pH is reaching, and possibly dropping as low as 7.8 or even 7.6 during the night hours, of if the pH is more steady, holding in the 8.2 to 8.3 range. Bottom line, you need to test for alkalinity to make a more educated statement about pH.

So, have you tested for alkalinity? What was the result?

butterflyx8i8x

I don't understand because my PH and my alkalinity is really good.

wake49

What do you mean by good? Is there a number you can quantify "good" pH and alkalinity with? What are your test results reading?

Pasfur

Forgive me, but in my past experience these sort of statements generally mean that the person has not tested the water at all. So, I have to ask for specifics to ensure you are not just making assumptions. Fair enough?

What were the result of your pH and alkalinity tests?