De-nitrate rocks in canister

[olga21]

I was wondering if I could but some de-nitrate gravel in the bottom of my marineland canister. I think there may be a problem with the flow rate though?

[archer772]

How old is your tank and what type of filtration do you have, LR, Skimmer, Flow, Fuge?? Canisters can lead to nitrate problems on there own.

[Horchata]

are you trying to bring the nitrates down?

[olga21]

Yea, trying to lower the nitrate big time. I have a 75 gallon tank with 3 marine land c-360 canister and a protein skimmer. I have atleast 80 lbs of live rock. I put some live rock rubble in each of the canister bottom treys. I just feel the bioballs and ceremics are not doing jack. So I was wondering if I could put some denitrate coral in them.
I due a 50 percent water change and the nitrate are still at like 75. No fuge and tank is about ten years old.

Thanks

[olga21]

I have a really small tank cabniet so thats why I went with the canister instead of the refugium setup. Everything is going ok, I have had a flame scallop for a month but I dont know if thats because I have a good setup or just lucky. Need to get the nitrates down. I do have room for a denitrate canister but it would have to be not tall.
Thanks again