Should I run GFO? Dose Nitrate? Looking for ideas

azbigjohn

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I am running a 210 gallon tank that is fairly new. This was a "fresh start" tank, and I am trying to do things the right way. It is going to be a mixed reef. I'm giving lots of background here, so if you want to jump to the question, look for the parameters list below, the questions will be there.

I had it maturing and building up the ammonia processing for quite a while, and added in the few fish I had run through qt a couple weeks ago. Currently two good-sized Ocellaris Clowns, a large PJ Cardinal, and a Bi-color blenny. I have a Kole Tang and some Barletts anthias in QT as we speak. I have been doing water changes and getting it ready to start adding in corals. After getting my levels where I wanted them (at least the big 3) I placed all of the frags that were remaining from my previous tank that have been chilling out in my FRAG tank for a couple months. Nothing too exotic, some hammers, a green slimer frag, a pocillopora frag, some mushrooms and toadstools.

Before adding the fish, I had added chaeto to the fuge, and after watching the BRS fuge lighting videos, I purchased some full-spectrum LED grow bulbs running in the standard "garage reflectors." Chaeto growth has been amazing, and I have no detectable nitrates. I started with a large softball 3 weeks ago, and pulled a volleyball sized mass out today, leaving the same amount in the tank. The tank was scaped with all new Marco rock cemented together, and I still have a higher level of phos than I would like. I have BRS 2-part and a dosing pump ready to start up once I add some more coral in (currently I am hand-dosing every couple days after measuring levels). I think I would like to run lower (but detectable) nitrates and phos, but am looking for other thoughts or advice.

Current Parameters are:

SG 1.026 (refractometer)
pH - 8.2 - 8.3 (Salifert test - run skimmer with outside air line / reverse lighting schedule)
Ammonia - 0 (Salifert)
Nitrite 0 (Red Sea)
Nitrate o (Red Sea - literally stays blue)
Alkalinity 8.3 dkh (Salifert)
Calcium 430 (Salifert)
Magnesium 1320 (Salifert)
Phosphate 0.17 (Hanna Checker)

So, should I dose some sort of nitrate? Should I run GFO to try and pull more phosphate out? (I figure I have a little leaching going on from the new rock.)

Or should I be happy, and wait for it to fully mature?
 
I love my GFO reactor but I added it long after my reef matured.
With you having a young setup and a fuge, I'd like to tag along a learn from others as well.
 
I don't see a problem with you running gfo. You can start gentle with some in a filter bag, but if you want to increase nitrates to detectable levels you might need to feed more, and thus phosphates could go higher and a reactor may be needed.
 
I would like to Bump for some more input. regarding to post #1.
 
I have a gfo/carbon reactor. I mix them together and I also have a fuge in my sump. Because of the sump, i tend to feed more for the extra nutrients needed for the corals. The chaeto in the fuge helps a great deal with my nitrates. I use about 1/3 of the recommended gfo and my phosphates are 0.00 with Hanna checker. Nitrates are usually 5>10 ppm. I can probably get away with just running carbon. My tank is 5 mos old.
I believe 0.03 is recommended phos levels so using a little may benefit you in that aspect. Your other parameters are good. You can feed a little more to increase nitrates. As your tank matures and livestock is added your parameters will change and you should have a better idea as to what you need to do to maintain your reef. Be careful with gfo.. too much, in my experience, seems to have a negative affect on corals. Causing polyps to shrink.
210 is a nice size. Enjoy filling it up!
 
How much GFO do you recommend running on smaller tank like an 80g. I want to start slow as well and got some bulk gfo from a friend. thoughts?
 
How much GFO do you recommend running on smaller tank like an 80g. I want to start slow as well and got some bulk gfo from a friend. thoughts?
I started at 1/4 of the recommended dose and Slowly built up to find my sweet spot. :)
 
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How much GFO do you recommend running on smaller tank like an 80g. I want to start slow as well and got some bulk gfo from a friend. thoughts?

Do you already have a reactor for it?
 

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