Originally Posted by
florida joe
http:///forum/post/2521915
My biggest concern is factoring in the amount of nitrate you are eliminating in your tank before you dose and how to make sure you continue at the same level as you dose. A change in your tanks present denitrifying capability both for the better or worst can have dire effects on your tank IMO
Wouldn't that be similar to what I was saying above? Basically if you have 20 PPM of nitrate in a 125 that builds over a period of sayyyyyy 1 week, adding blah blah MLs of vodka would cause it to drop to around 1-2. I would think an easy way to find out would be to shut off your sump or filtration for a week to see what normally would occur if you did not have any filtration.
I don't use what isn't biological filtration to begin with in some of my tanks. Included in this is sponges, tunicates and clams. I think the main goal is to create a tank that is completely self sustaining. I use protein skimmers for the first few months that I am cycling a tank. Don't get me wrong, every tank needs water movement. But look at the rest of the chemicals.
If you can balance what is in your tank, then why have a need for anything else. Clams and Tunicates and Sponges are all particulate organic filter feeders. Some tunicates also feed off of bacteria. Clams will take in such harmfull chemicals as phosphate and nitrate and that's that. Also, I run about 5 times my tank volume through my sump. I don't go for the whole 15x thing through it. The sump is only filled with feather caulerpa on this particular tank. Just to me it would seem the longer the amount of time the water is in contact with the macro, the more of an active roll the macro can play. Rather then just have it flow through it so quick, it really only pulls out particulates that are visible to the bare eye. Longer time = more take up of chemicals and CO2 which = production of more 02 and sugars which = percipitation of phosphates (most of the time anyways).
Then there are things like nassarius snails that should rid your tank of detritus, fish waste and excess food. They then burry themselves in the sand an excrete it. Your sand bed then breaks it down and turns it in to less harmfull nitrate. But this is either taken in by the things in your tank that feed off of nitrate, or can be precipitated out of your tank via other methods. It's the entire above process just starting all over again I guess you could say.
Once again, I do NOT recommend trying ANY of the above.