Polypterus_36's Cuban gar thread

  • We are currently upgrading MFK. thanks! -neo
thebiggerthebetter said:
Understood. No biggie and I respect your space and reasons, as stated.

The tank can run for 10 years problem free with a smaller bioload and then not be able to handle higher bioload.

If the bioload is about the same and the tank handled it before and now doesn't, this means something significant has changed. Only you can figure out what.

One area many overlook in filtration is that the water entering biofilters must be highly aerated, the higher the better. Otherwise the limiting factor in your biofilteration capacity will be dissolved oxygen concentration in the water entering your filter, not the size of the filter, not the amount of media or its surface area, not the flow rate through the filter.
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Would adding a larger airstone help with the oxygenation of the water going into the filters?
I don't want to create too much surface movement, because I don't want to stress the gars out.
 
Adding any kind of stirring increases DO and the air bubblers are the most energy efficient stirrers. Nor would they create waves if the pumped air dispersed into tiny bubbles - it creates a sort of sheet flow effect. I am not arguing for adding bubblers necessarily although it may be a good idea. As a basic, I'd make sure I am not drawing water into the filters from any stagnant areas in the tank with little or no flow, which is often the case near bottom, or in a corner or close to a corner of a rectangle tank, or behind some scape / furniture, between scape features blocking good flow, etc. This is often easily corrected by a powerhead, or some other placement of intakes, closer to the surface, away from corners, near strong water agitation/flow, for instance.

BTW, it's not the bubbles that aerate water but the flow and stirring created by them. Bubbles add little, perhaps a few % to the overall increased aeration effect.
 
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xenacanth9 said:
Any updates
It's too bad, they were very cool fish
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I had 2 losses since the last update.
Both died on the same day and showed no signs of distress before their passing. Their deaths happened 2 days after a water change.
thebiggerthebetter thebiggerthebetter I moved my Fluval fx6 outflows on my tank to position them more downward. It seemed to improve the water levels as it eliminated any dead spots.
The last 4 are doing well. They have good feeding responses, and they are behaving normally. I do believe I am seeing a slight improvement in their backs, although that could just be me seeing things.
 
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Mines growing but has been having issues with his jaws. It can no longer fully close them. During feeding he struggles to take food. I have to rub the tilapia strips on his snout and it takes him three or four bites to actually snag it. I’ve heard other people are having issues with this batch of Cubans as well.

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Sorry to hear this. I agree that the mouth or rather upper jaw looks not quite right. I don't see this with our 7, but now that I saw this, I will check them out closer.

This is a bad sign overall. Artificially bred fish abound in defects. As I said in our thread one of ours came with a misaligned snout.

I'd also say that one of our 7 is obviously thinner than others, which worries me.

Cowturtle said:
I’ve heard other people are having issues with this batch of Cubans as well.
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Tell more, please. What you've heard?
 
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