Nitrates trending back up

asome_one

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I upgraded tanks about 3 months ago from a 15 gal sumped to a 5gal to 35 gallon sumped to 5 gal. Originally I had a bunch of problems and had serious problems growing coral. I always had nitrate issues despite feeding only 5-7 1mm pellets a day which would be eaten quickly. That stocking was 2 clowns under 2 inches and 1 6 line wrasse under 2 inches. The wrasse jumped a little while ago and has been replaced...I'll discuss that. Anyway I always wondered why I could not keep nitrates under control and had such a problem with algae. When I broke that fluval flex tank down i found a couple interesting things.
The biggest problem I noted was that I plumbed the sump into the false back filtration system. So that meant that regardless of how fast the sump was running it was completely dependent on how efficient the main tank pump ran. I thought it was decent until I pulled the sump off during the transition and found an absolutely abysmal tank turnover rate from that main tank pump. I figured this was the root cause of my problems since my oversized skimmer and filter socks rarely saw much waste.
Nitrates sat between 50-100 via an unexpired salifert kit test at the end of every week.
Moving on to the new tank, I have direct plumbed the sump with dual pumps running at least 400gph turnover. Much Much happier with how quickly my filter socks fill up.
onto the main issue.
I still have high nitrates.
This tank is stocked currently with 2 blue devil blennys 2 clowns, and roughly 8 snails. I feed roughly the same rate about 8 1mm pellets per day via auto feeder. I taped the outlet and did a bunch of testing to ensure its more or less this amount. I plan to reduce the 2 blennys to one Im just trying to figure out the less aggressive one at the moment. Still I have trending up nitrates. 50-100 was my last test prior to water change.
25-50 post water change. unexpired salifert nitrate kit.
I upgraded lighting from a basic amazon light to an AI prime HD and nero 5. I have more than enough light and flow now.
My main question here, do I have enough rock?

I think I have covered my bases here. I do weekly 15 gal water changes. I may miss by one or two days but they are almost always on that weekly mark. I haven't added anything to the tank aside from the 2 blennys...but the nitrates were trending up before this.
I do not think i overfeed by any means. I may add some frozen food once a week that's eaten within 5 minutes or picked up by my sock which I normally change shortly after. I run carbon 4 tbsp in a reactor. I also run purigen in the reactor. I am seeing some green algae growth in the upgraded tank along with some brown algae forming on the eggcrate but nothing crazy. I can scrape and clean it all off opposed to before where it was taking over corals and bothering me on the rock. I Think my upgraded clean up crew does that.
I dont know the poundage of my rock. but could that be where the problem is? Is that my overall issue?
I think I've covered the bases here. I consider this tank to be continuously running since I just moved over all my previous rock and equipment. This leads to a setup time of over 1.5 years.
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Rocks are where the nitrifying bacteria live that turn ammonia to nitrate. So no, a lack of rock won't cause nitrate issues.

Do you have any corals or macro algae? If not, the only nutrient export you have is water changes and your nitrates will climb.

If you'd prefer the clean look (as opposed to a refugium) take a look at adding an algae scrubber or a Donovan's Nitrate Destroyer.
 
Consider a larger change, or different filtration means (such as a refugium, biopellets, etc.). There are also nitrate absorbing medias from brightwell and aqua fx.

Was the new tank filled with water from the old tank?
 
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3 rocks and no sand is also very little surface area. I would possible consider adding a small layer of sand or maybe some biomedia to the sump (I like seachem matrix). This probably wouldn't do anything for nitrate but it might be handy.
 
3 rocks and no sand is also very little surface area. I would possible consider adding a small layer of sand or maybe some biomedia to the sump (I like seachem matrix). This probably wouldn't do anything for nitrate but it might be handy.
There's more than 3 rocks. The entire bottom of the tank is filled so it's probably 8 rocks of similar size. I opted for the bare bottom in the upgrade due to watching brs + having lots of algae growth in the previous smaller tank.
The tank was partially filled with old water but added about 20 gallons of new water
Rocks are where the nitrifying bacteria live that turn ammonia to nitrate. So no, a lack of rock won't cause nitrate issues.

Do you have any corals or macro algae? If not, the only nutrient export you have is water changes and your nitrates will climb.

If you'd prefer the clean look (as opposed to a refugium) take a look at adding an algae scrubber or a Donovan's Nitrate Destroyer.
Why didn't I know that rock didn't uptake nitrates oh man. I have a couple zoa's, gsp, toadstool, mushrooms, leather, but nothing particularly large. I'll consider chemical removal means. I've so far not been interested since I've read so many articles that say you're addressing the symptoms and not the problem. So I've been chasing the problem.
 
I'll consider chemical removal means. I've so far not been interested since I've read so many articles that say you're addressing the symptoms and not the problem. So I've been chasing the problem.
Yep, the only problem is you don't have an export system. Give Donovan's Nitrate Destroyer a look. Think of it as a Vodka (carbon) dosing reactor. Mine took about a week and a half to start but took my nitrates from 40ppm to 20ppm in just a couple days and if you keep dosing too much it will actually bottom you out.
 
Yep, the only problem is you don't have an export system. Give Donovan's Nitrate Destroyer a look. Think of it as a Vodka (carbon) dosing reactor. Mine took about a week and a half to start but took my nitrates from 40ppm to 20ppm in just a couple days and if you keep dosing too much it will actually bottom you out.
While this is an option I dont think I will pursue this route. However this conversation has made me rethink my tank and I think I will be adding a biopellet reactor. I already have the reactors and a manifold I just need biopellets. Refugium is a no go as I like my vibrant when algae gets too thick.
 
There's more than 3 rocks. The entire bottom of the tank is filled so it's probably 8 rocks of similar size. I opted for the bare bottom in the upgrade due to watching brs + having lots of algae growth in the previous smaller tank.
The tank was partially filled with old water but added about 20 gallons of new water

Why didn't I know that rock didn't uptake nitrates oh man. I have a couple zoa's, gsp, toadstool, mushrooms, leather, but nothing particularly large. I'll consider chemical removal means. I've so far not been interested since I've read so many articles that say you're addressing the symptoms and not the problem. So I've been chasing the problem.
Rocks can help with anaerobic bacteria that help with breaking down nitrates but not very well. The whole tank would need to be filled with them. Try some more water changes to drop them down. It takes alot of changes to make a noticeable drop.
 
Biopellets just start slow like one quarter what is recommended. Let i run for a month . Add alittle more pellets . Until you are at 5 to10 nitrates . More fish alittle more pellets. Mark the level of your pellets they will deplete over time.
 
It is a good idea to run the water coming out of the reactor into you skimmer.
I did see the info in my researchings. Thank you! I will give this a shot. Finger-crossed coral growth skyrockets as i drop nitrates.
 
Did you start with dry rock? I've never done bare bottom but Ryan from BRS had all kinds of issues and added sand.
 
Did you start with dry rock? I've never done bare bottom but Ryan from BRS had all kinds of issues and added sand.
I had some live some dry initially. Also had a 3 inch fine sand bed. The sand was slowly siphoned out over a 6 month period.
Did he make some videos on that? I'll definitely search em up
 
I had some live some dry initially. Also had a 3 inch fine sand bed. The sand was slowly siphoned out over a 6 month period.
Did he make some videos on that? I'll definitely search em up
It's the new 360 series on his personal tank. May not apply to your situation
 
So its been about a month since I got a bio pellet reactor up and running. I have seen a large spike in coral growth. I removed the carbon and purigen. At the end of a week where I would normally see the 100 ppm on the salifert kit very clearly before the 3 minute mark I ended up seeing between 50-100 Still high but coming down. My tank seems to appreciate the no carbon/purigen. I see more particles floating around and the water doesnt look quite as clear but my 50 micron socks handle most of that. I very much appreciate the knowledge given and am very happy I made this post as I would have continued chasing the dragon without any success.

My tank is right next to my computer and as I'm on my computer most times I'm home i look at it frequently...the growth of the corals have given me new hope into the reefing hobby I was close to abandoning.
I appreciate yall.
 
3 rocks and no sand is also very little surface area. I would possible consider adding a small layer of sand or maybe some biomedia to the sump (I like seachem matrix). This probably wouldn't do anything for nitrate but it might be handy.
+1 on adding a liter of media. I would suggest a hang on reactor like a Two Little Fishes 150 or 550. that will help! I've used both matrix and siporax with very good results. Note that these reactors will need maintenance but it is minimal. When they need to be cleaned you can just leave a little head space for shaking, then disconnect and shake heavily and dump out the mulm and detritus, then put back on line. pretty simple actually. if you decide to go the reactor route, i would not use the foam inserts, just the screens.
 

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