Originally Posted by
NaClH2O Nut
http:///forum/post/2985941
That is what I was thinking. I understand where some people think that they can become nitrate factories. I prefer nitrate factories that just means I will not have ammonia or nitrites. I can deal with Nitrates- fuge, waterchanges, nitrate absorbing materials, TIME(dinitrate bacteria)
One just has to understand that it is a filtermedia and will need to be maintained.
I was curios on the use of rubble and have heard many times it will collectmore"dirt" then the bio balls. I can see that happening. So as for now I am sticking with my blue balls.
If the live rock rubble is big thick peaces then you will get the benefit of the removal of nitrate. If the peaces are thin and small it may just give you the same benefit as bio-balls and only convert ammonia and nitrite.
As to trapping the waste, there is not much difference in filtration media, just the ease of cleaning. If you completely remove the bio-balls and leave it empty then where do you think that waste is going to go?
The waste will end up in the sand, on the LR, or in some other mechanical filter. So if your maintenance procedure has you cleaning the sand, the LR, and any mechanical filter you may have then removing the bio-balls and letting the waste collect where you will remove it is a benefit. If you chose to clean the bio-balls then you get the added benefit of more ammonia and nitrite conversion.
So the belief that bio-balls needs to be removed to reduce nitrate is false. It is true that waste gets caught in bio-balls and you need to decide if you are going to clean that waste out or use LR, a skimmer, carbon, or algae to remove the nitrate associated with that waste.