Originally Posted by Bluydgrl
The ph in tank is 6.6 and the ph in the tap is 7.6...I do have a good flow in my tank with my power head and the air pump..I will find a good home for Dojo's when they get bigger.I
work at the LFS.I will make sure they find a good home.They are somewhat small now.I have my temp at 77-78..My tank has alot of plants in it that are doing great for oxygen I'm thinking?
Should I do a 5 gallon water change every day to see if that will help?
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Oxygen is not likely the issue. In any aquarium, unless it is way overstocked or something suddenly happens to the biology, oxygen will not be a problem. The gaseous exchange at the surface handles this. Fish breathing more rapidly than normal, gasping at the surface, acting listless--all these signs are almost never due to shortage of oxygen. Which is why we are asking questions, to pin point the issue.
I asked about the pH because this, like nitrates, can be a sign of something wrong. Even with all the frequent water changes you are doing, the tap pH of 7.6 is lowering quite a bit down to 6.6 in the aquarium. Has this always been the case? It would also be useful to know the GH and KH/Alkalinity of the tap water, as this is related. A too low pH for the fish species can cause the symptoms desribed. Now, here I would not expect much of an impact at 6.6 with the fish named since most are soft and slightly acidic water fish, but if this is fluctuating it could be more serious.
Which fish species are respirating faster than normal? Is this when they are at rest?
If it is the loaches, it could be oxygen and the temp may be part of it. These fish are cooler water, low 70's is sufficient.