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Discussion Starter · #1 ·
Hello. New to forum. I have 200 gall tank. Going to be reef tank. Has 75 gallon sump with refug. Had tank up for about 8 years. Had to move and take it down for 3 years. Now it is back up and running. It has 180 lb of Fiji dry rock which I cycled for 1 month. Set up tank with Fritz turbostart 900. Been up 2 months now. Have two small yellow tangs and three small clowns. 8 softy corals. Just finishing the first stage of ugly tank ( Dino’s). I have not started refug yet with Cheato.
I am experiencing something I have not had before. 0 nitrates. Before I always had 5 nitrates. But this time I have 0 ammonia, 0 nitrite, 0 nitrate, 8.2 ph. Should I be concerned about the 0 nitrate?
 

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Are you sure test results are correct. Maybe a bad test kit.
I would want some nutrients once they get too low you are more likely to have dino plus coral color is better in my opinion.
 

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Discussion Starter · #3 ·
Checked with two different test kits. Had 80 ppm during the cycle. Now showing zero. In the eight years I had it up before I never had 0 ppm. Always ran about 5 ppm. Been over feeding for about 3 days in hops of showing some nitrates.
 

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Discussion Starter · #4 ·
Checked with two different test kits. Had 80 ppm during the cycle. Now showing zero. In the eight years I had it up before I never had 0 ppm. Always ran about 5 ppm. Been over feeding for about 3 days in hops of showing some nitrates.
Could this new skimmer be stepping all the organically out of the water to leave no nitrates at all? Going to slowly increase the bio load so that may correct this.
 

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Discussion Starter · #6 ·
Dinos almost gone. Been over feeding 4 days. Still showing 0 nitrate. Everything looks good so I am just going to ride it out and see what happens. Small amount of green algae showing. Going to also slowly increase bio load by adding a couple of fish at a time. I basically have the exact same setup as I ran before changes are new skimmer, new heaters, new lights, new power heads. Still Using ro/ di water. Reef crystal salt. First time I have ever had 0 nitrate. I did use Fritz turbo start 900 to start the tank.
 

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If you have algae growing in the tank the nitrates might be locked up in the algae as opposed to being in the water column. My tank is currently doing the same thing (4 months old). Once the algae starts dying off it will release those nitrates back into the water and your tester will be able to pick them up. You can also try increasing the feeding and skimming less aggressively.
 

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Discussion Starter · #8 ·
Been over feeding about a week. Cut back on skimmer time. Dinos gone. Have thin layer of green algae on rocks right now. Increased bio load by adding 5 more fish. Still no nitrates. Will just ride it out. Everything looks good. Fish doing great. Corals all open and looking good. I agree when the algae dies off it may start showing nitrates. Thanks.
 

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Fry Daddy! Multiple tanks, reef, seahorse
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I late responding. But with a tank that size of water volume and being cycled it not uncommon for nitrates to be undetected. The biological processes are handing it and even coral take up nitrates. My tank is half that size when considering total water volume and I over stocked it right from the beginning because I used fresh gulf live rock and didn’t have any nitrate reading for a few months . At least not anything the Salifert test kit detected.
, I would just feed the fish a fish more, make them happy and fat. I still-over feed and have12 fish. I wouldn’t be concerned because over time they will more than likely increase.
 
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