plenium with crushed coral

uncleant · 04/03/2008, 04:34 PM

Anyone every use a plenium with crushed coral? I think i have seen one thread on it here and i just wanted to know how they work. I am dealing with high nitrates and am curently in the process of making a sulphur denitrifer and i am going to be moving the tank down to the lower lever of the house so i wanted to do a few changes to the 125 gal tank. Thanks!

seapug · 04/03/2008, 04:52 PM

Plenums need be below a deep bed of fine sand to work correctly-- they need the low oxygen zone created by being beneath a deep bed of dense fine sand. Even then they have been shown to not be necessary if you have a deep sand bed, as the same anoxic conditions are created without a plenum.

Your problem is probably related more to the crushed coral than the absence of a plenum. Adding more live rock would probably provide the same benefit with less trauma to the system than replacing the substrate.

04/03/2008, 04:34 PM	#1
uncleant Registered Member Join Date: Sep 2007 Posts: 251	plenium with crushed coral Anyone every use a plenium with crushed coral? I think i have seen one thread on it here and i just wanted to know how they work. I am dealing with high nitrates and am curently in the process of making a sulphur denitrifer and i am going to be moving the tank down to the lower lever of the house so i wanted to do a few changes to the 125 gal tank. Thanks!

04/03/2008, 04:52 PM	#2
seapug Registered Member Join Date: Dec 2006 Location: 4980 ft. Posts: 7,954 Blog Entries: 1	Plenums need be below a deep bed of fine sand to work correctly-- they need the low oxygen zone created by being beneath a deep bed of dense fine sand. Even then they have been shown to not be necessary if you have a deep sand bed, as the same anoxic conditions are created without a plenum. Your problem is probably related more to the crushed coral than the absence of a plenum. Adding more live rock would probably provide the same benefit with less trauma to the system than replacing the substrate. __________________ insert clever saying here. Current Tank Info: 200 gallon custom Marineland DD peninsular tank. LPS dominated mixed reef. Previous 90 gallon mixed reef TOTM April 2009.