Cliffhangers, gotta love them. Now, you didn't think I did that on purpose did you? Actually, I was going to PM you directly & hopefully have some sort of discussion. I was trying to avoid a feeding frenzy, but I guess if you guys twist my arm hard enough I would give in. Plus I have been really busy lately & not enough time to type all this up.
There are 2 main objectives we as reefers try to accomplish. One is to provide the necessary environment for our aquatic friends through additions (salt, CA, ALK, MG, Iodine, proper lighting...etc). The second objective is keeping the baddies out (ammonia, phosphates, N02, NO3...etc.). I am sure that most would agree that it's more difficult to control the latter.
Looking at this beautiful tank it's quite evident that things are going well. We receive reports of things growing, evidence that at least the essential elements necessary for growth have been met. So, we will not focus on this. Instead, and what is more intriguing about this situation, is why nutrient export seems to be greater than import.
Letââ"šÂ¬Ã¢"žÂ¢s briefly list the causes of Nutrient Import:
1) fair stock of corals
2) the fuge (oh yes, do you think that all the biological growth in there contributes nothing at all?) Think of all the pod skin shedding, their defecation, slews of the plants you are growing...etc).
3) the lights, a big potential contributor to imports, especially when all the necessary trace elements are present (photosynthetic life)
4) the fish & feedings (the biggest contributors to our problems).
Nutrient Export:
1) The 150LB of "live" sand. Look at the pic below, anything look familiar (is that fiji pink)? Tank was at the 5mo mark & never any problems. I barely had a cycle using that aragalive sand & it seemed to have done wonders (I think I only used a 30lb bag in there). One thing that I did notice though was that poop would sit on top of the sand, perhaps because I did not have the proper sand stirrers. When I stirred the sand myself things were great & detritus no longer appeared on the surface. I have never seen anything major in terms of multicellular life in that sand, but it must have been teaming with bacteria. I have heard of similar reports from others using this same product.
(donââ"šÂ¬Ã¢"žÂ¢t nag me about the content, I know. Also, tank was lit my 96W T5 only)
2) The 200lb of live rock. If you take notice you see that your rock is piled in this mountain, giving shelter & shade. You have a great deal of corals on top of the rocks, further shading portions of your rock work. You are using relatively low light (although enough) for relatively shorter periods of time. (this will make more sense in a bit).
3) skimmer (no comment)
4) the fuge (in particular the caulerpa, one of the best macro nutrient exporters). But I donââ"šÂ¬Ã¢"žÂ¢t think you have enough to make a true impact in your tank, so I wonââ"šÂ¬Ã¢"žÂ¢t focus on this. If anything your system is surely benefiting from the occasional feedings bestowed from the fuge.
5) the transient carbon filtration (pollutants)
Did I miss anything?