Re: How much rock in my sump? LR does not produce nitrates that is correct it does help reduce them if properly used I would think. From what I have heard in the past is that if the LR is not sumereged than it is similar to bio balls with the water just flowing over them Dont know how this would really work. Thats what I meant about the nitrates. I didnt see any difference in parameters with the bio ball LR swap. I did see some great changes when I installed my new refugium thoe. |