Cories and beneficial bacteria

[FlareBettaGuy]

Cories seem to dig into the gravel a lot. I've been wondering if they will harm the beneficial bacteria clinging onto the gravel. Will they harm the bacteria? How about if the bacteria is just starting to grow and cycle? Thanks!

 

[Inchworm]

Hi FlareBettaGuy

Corys will NOT harm the bacteria that is growing in your tank! You have absolutely nothing to worry about there!

 

[ste2k3]

the corys will actualy help the bacteria in the gravel. they will move the gravel knocking old dead bacteria off and leaving space for new ones to grow. this is why fluidised bed filters are so efficient.

 

[Inchworm]

... this is why fluidised bed filters are so efficient.[/QUOTE]
Hi ste2k3

What is this? I've never heard of them before.

 

[fishgeek]

basically sand in a tube with current of water pumping up thru tube
work well unless they stagnate ie sand particles come out of suspension

they seem to be popular in marine aquariums or larger setups

link

another

 

[ste2k3]

hi, like fishgeek said, they are used on marine aquaria and large comercial systems. they used to be vary popular on marine tanks but like trickle filters, they are "going out of fassion" so to speak. basically imagin two tubes inside one another. the inner being about 1" and the outer being about 6". there is a bottom and a lid glued on to this with the inner tube stopping about half an inch short of the base. water is pumped down the inner tube and rises up the outer tube. there is some sand in the outer tube with lifts and fluidises with the upward current which has to be regulater as not to lose the sand out of the top and to make sure it actually fluidises. hope this helps.