Internal Filters...

[darrel69]

I have a Fluval internal 3+ running at the top of my fish tank so it can also act as an air pump. What i want to know is, if i close the air nozzle top, so it cant act as an air pump, and i have it running at the bottom end of my tank, will it disturb any of my good bacteria ?

 

[smithrc]

nope.

 

[Darkstar]

No, however it is dependant on how well stocked your tank is and the surface area your tank has.
Everything in your tank such as fish, snails, the bacteria in your filters require oxygen to survive...The fact that you are reducing areation at the top of the tank will in turn reduce the levels of oxygen in the water (to what extent is uncertain...too many factors involved, you'd need to test it really).
Whether the oxygen levels are reduced enough to cause problems is anyones guess right this minute...is your tank overstocked at all?

Personally I'd give it a go and keep a close eye on any fish you have. If you find them swimming up the the surface to gulp in air more often than they did then I would return the filter to it's original position and settings...and keep an eye on your water parameters too for the next month or so.

 

[darrel69]

No, however it is dependant on how well stocked your tank is and the surface area your tank has.
Everything in your tank such as fish, snails, the bacteria in your filters require oxygen to survive...The fact that you are reducing areation at the top of the tank will in turn reduce the levels of oxygen in the water (to what extent is uncertain...too many factors involved, you'd need to test it really).
Whether the oxygen levels are reduced enough to cause problems is anyones guess right this minute...is your tank overstocked at all?

Personally I'd give it a go and keep a close eye on any fish you have. If you find them swimming up the the surface to gulp in air more often than they did then I would return the filter to it's original position and settings...and keep an eye on your water parameters too for the next month or so.

Im not completely removing oxygen from my water, i have a spray bar that is oxygenating also. I just want to stop my fluval from blowing out air bubbles as both of them together (the fluval & spray bar) make way too many air bubbles to the extent of making my water cloudy.

I have closed the air nozzle on my fluval and pushed it to the bottom, back end of my tank. Im hoping it wont harm my bacteria in any way because my external is not mature enougth yet.

 

[vinylman]

I think a lot of people worry needlessly about water being sufficiently oxygenated (unless of course you have to massively overstock - Malawi Cichlids, for instance) . ANY half decent filter will ensure the water is oxygenated.

 

[backtotropical]

I think a lot of people worry needlessly about water being sufficiently oxygenated (unless of course you have to massively overstock - Malawi Cichlids, for instance) . ANY half decent filter will ensure the water is oxygenated.

I absolutely disagree. People don't "worry needlessly". Oxygenation is absolutely vital to keeping the fish alive, and it is one of the most crucial factors in successful fishkeeping.

Also, to say "ANY half decent filter will ensure the water is oxygenated" is nonsense.

In order to ensure the water is oxygenated, the aquarist must ensure that there is sufficient water-surface movement. This can be done using a filter, however simply puting a filter in a tank with no consideration for the provision of surface movement could result in little or no oxygenation occurring at all.

Of course, oxygenation can be provided by plants rather than surface movement in a heavily planted tank.

 

[vinylman]

Apologies for my nonsense, but no one has pointed it out before as being such. Granted, if fish are gasping at the surface, oxygen is short, but that's not the impression I got from the post.