Question: Different Gills?

[bkolik]

Hello,
I have 2 axos, leustic's gills was too long and too much but now very less, black one is the opposite. In the past black's gills very less but now his gills much and long.

Is it normal? Will gills fall out and grow back?
Why gills fall out?

 

[wolfen]

the gill filaments don't fall out but they can regress, this normally happens if there is something wrong with the water and will re-grow once corrected (although sometimes not as neatly as originally grown).
the gill filaments are fine blood vessels that allow for oxygen to be taken from the water into the blood stream, if there are any toxic substances in the water an axolotl will regress the gill stems and filaments to protect itself, you may find that your axolotl will make trips to the surface more often although it can still absorb oxygen through it's skin.
as for why one axolotl is affected whilst the other isn't is because different axolotls have different tolerances to their environments.
do a full water parameter test ie.. temperature, ph, ammonia, nitrite, nitrate, kh, gh.
ensure adequate/good water oxygenation.
turn sand over weekly to release debris and gasses prior to a water change.
add 2g/l non-iodised salt to the water to help protect and aid recovery.

 

[bkolik]

I

the gill filaments don't fall out but they can regress, this normally happens if there is something wrong with the water and will re-grow once corrected (although sometimes not as neatly as originally grown).
the gill filaments are fine blood vessels that allow for oxygen to be taken from the water into the blood stream, if there are any toxic substances in the water an axolotl will regress the gill stems and filaments to protect itself, you may find that your axolotl will make trips to the surface more often although it can still absorb oxygen through it's skin.
as for why one axolotl is affected whilst the other isn't is because different axolotls have different tolerances to their environments.
do a full water parameter test ie.. temperature, ph, ammonia, nitrite, nitrate, kh, gh.
ensure adequate/good water oxygenation.
turn sand over weekly to release debris and gasses prior to a water change.
add 2g/l non-iodised salt to the water to help protect and aid recovery.

I changed aquarium. Last one is 30L now 100L tank. And water is new, is salt effective?

 

[wolfen]

a low level of salt is quite beneficial and effective for axolotls.