• Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.

High Nitrate

Im having a problem getting my nitrate levels back to 0. Right Now its between 10 to 20 ppm. I keep doing water changes and removed all the bio balls. Wont seem to lower below 10 ppm. Any thoughts to what i can do?
 
George,

You are doing all you can unless you are overfeeding. Nitrates are something we all fight with. Do you have a refugium set up growing algae? That can help. I use a sulfur denitrator on both my tank so it keeps my nitrates in check. Are you doing 10% water changes weekly? I personally would not worry about a 10-20ppm nitrate reading. But if zero is what you want try a sulfur denitrator.
 
Rbu1 said:
George,

You are doing all you can unless you are overfeeding. Nitrates are something we all fight with. Do you have a refugium set up growing algae? That can help. I use a sulfur denitrator on both my tank so it keeps my nitrates in check. Are you doing 10% water changes weekly? I personally would not worry about a 10-20ppm nitrate reading. But if zero is what you want try a sulfur denitrator.

Ive been told high nitrate can kill off corals. I had a rose anemone that closed all up and took back to lfs until i get the nitrate lower. How can i set up a refugium? Someone told me with a 55g a refugium wont help much
 
since you guys are talking about hi nitrate, and we always hear that question "what is your nitrate level?", does anyone have chart or rule of thumb on what range is bad for what type of coral? i myself have not seen one.
for example o-5 safe for most acro/ 5-10 still ok for less demanding ones but not as colorful/ 10 -20 turning brown/bleaching/ 20-30 dying/ 40+ buy new rocks.....lol. (i made these ranges up as a sample; it's hypothetical)

also test kits varies quite a bit, even salifert. how accurate can one get to the "true" measurement?
i just got a pinpoint nitrate monitor and after a careful calibration, it detects more nitrate than the salifert. 10 vs 2 ppm.

people who claim that they have zero or undetectable level...wonder what test kit they use. the only time i ever get an undetectable level is before the mixed water gets into the tank. i set my calibration of the nitrate monitor to 10 and over (if the level is less than 10 then it just says low level). i am clearly no expert but i have been keeping mostly lps's, some softies and few sps's with some fish for a few years now.

would like to hear other people's input on this.
 
My nitrates have always been a little high, I have stopped fighting with it, and just do my regular water changes. For those who have seen my small tank :) my coral's are thriving regardless.
 
long term "exposure" to nitrates is what's bad for corals. As a matter of fact, some softies don't mind some trace nitrates in the tank, and even clams benefit from it. Most people who keep hard corals prefer to keep the nitrates lower because it keeps the corals colored up nicely (along with several factors) instead of looking all brown. Frequent water changes, wet skimming (to prevent breakdown into trates), portioning out the food; target and/or spot feeding all help in the reduction of nitrates (as does cultivating chaetomorpha or other algaes in the sump).

Water changes are still the best option IMO
 

mnat

Officer Emeritus
Staff member
Moderator
Just look for a CPR hang of the back refugium. We have one on our 30g and just bought one for the 20g. We added live sand and live rock and a ball of chaeto to help with nitrates.
 
Top