cr500_af;645540 wrote: Now we find ourselves (some of us, anyway) going away from what was once considered "the amount of live rock you need", and using minimal aquascapes (giving up much of the biofilter in the process). Requiring, of course, new learning, new ideas and new products. Without the biopellets, media and such that are now on the market it wouldn't be as easy, and might border on impossible.
I'm not sure if it is actually us giving up most of the biofilter, rather than using more of the available biofilter in the smaller quantity of LR we do use. I came back into the hobby when the 1-3 pounds of LR per gallon was the recommended amount. After a couple tank changes and now having open aquascapes with a ratio of about 3/4# LR per gallon, what I think we were doing was clinging to an old anecdotal idea that evolved many years prior and just didn't go away and hasn't been challenged until now by people going to open aquascapes with much less LR than before. In addition, folks still load up their sumps with LR in addition to whatever they use in their tanks.
I believe it is like this, and the numbers I use are just examples: let's say I have 400# LR in a 400 gallon volume system. I am probably using 10% of the total biofilter capacity with the bioload of the fish/corals. I redo the tank, and now use 200# LR in an open style aquascape. The bioload is the same. The current LR doubles the percentage of its biofilter capacity used to 20% from 10% since there is no longer twice as much rock to spread it around in.
Porosity in the LR would make a difference as well, but assuming we use porous LR, whoever started the 1-3#/gallon rule
really underestimated the capacity of LR to filter our water. We are just underutilizing the capacity in the amount we have.
One thing I think I remember correctly from the early 1990s was that most of the LR used in the hobby was Caribbean type, dense, and not porous at all, so the 1-3#/gallon rule may have started because through experience, Reefers then found they needed that much because of the lower biofiltration capacity of that type LR.
Again, the above JMO. Feel free to disagree, etc.
Fish Scales2 wrote: Agree 100% except for temp. I will add "it is only as difficult as you make it"
Stable temp can lead to issues quickly if something goes wrong such as a heater sticking on or shutting off. Corals can handle reasonable swings of 5-7 degrees with no issues.
Not sure about this one Chris....corals can handle some temperature swings yes, but do stable temps in a reef tank make corals
unable or less able to handle temp swings when they do occur? That concept is a new one on me.
Edit:
Assault;646049 wrote: The hardest thing about this hobby is, the things you do right will eventually pay off in the long run, but as soon you do something stupid, disaster shows up instantly:doh:
That, and the fact that every thing's so ****ed expensive.
Hi Howard, great to see you!!!!!!:thumbs: