ok i give up.. i have to start over..

[Jason McK]

Yes the theory is that with in the LR there will be anaerobic bacteria that converts Nitrate to Nitrogen. This is not always possible, with high bioloads and rock too dense or too porous.
that is why 'we' have added DSB, Refugiums, and Coil denitrators.
But having Rock that can not convert Nitrate to Nitrogen does not render it useless

J

[Johnny Reefer]

Originally Posted by Jason McK

....But having Rock that can not convert Nitrate to Nitrogen does not render it useless....

Sorry. I'm confused. I'm not suggesting the LR is useless. To the contrary, I'm suggesting that the LR should be doing more than just nitrification. I must have misinterpreted your other post. I thought you were speaking of all LR as not being expected to convert Nitrates to anything. Didn't realize you were specifically addressing asherah's LR.
This is why I hardly post on here anymore. Always misinterpreting.

[Jason McK]

Mark, I think I'm confused now.

I'm sugesting that any LR will not elliminate 100% of Nirtate do to the fact that anarobic zones in the LR will not be enough to handle most closed systems.
This is why so many other methods are developed to handle excess Nitrates.

Now I should preface myself by saying I'm hypothesizing via what i have read and the what seems to be a common theme, having to rid Nitrates for a tank

J