Amonia Levels

[mike]

Have a 75 gal community tank. Been established for 2 years. No current or
prior problems with dying fish. Have started to pay more attention to water
quality. Can't get Ammonia level to "0". Have performed 3 50% water
changes in last 7 days. Vac gravel at same time. Feed once every two days.
Use de-Clor with replacement tap water. Ammonia level drops to 0.25 day
after 50% change but increases to 1.0% after that. Run out of ideas. How
do I eliminate the amonia.

Thanks very much.

[Geezer From The Freezer]

mike wrote:
>
> Have a 75 gal community tank. Been established for 2 years. No current or
> prior problems with dying fish. Have started to pay more attention to water
> quality. Can't get Ammonia level to "0". Have performed 3 50% water
> changes in last 7 days. Vac gravel at same time. Feed once every two days.
> Use de-Clor with replacement tap water. Ammonia level drops to 0.25 day
> after 50% change but increases to 1.0% after that. Run out of ideas. How
> do I eliminate the amonia.
>
> Thanks very much.

Mike,

How many filters do you have, and what type. The more space for
bio-bugs the easier to remove ammonia and nitrite.

[starfish]

How many fish do you have in the 75gal?
Do you have enough filtration and airation?
"mike" > wrote in message
news:IQYhd.30840$SW3.23701@fed1read01...
> Have a 75 gal community tank. Been established for 2 years. No current
> or prior problems with dying fish. Have started to pay more attention to
> water quality. Can't get Ammonia level to "0". Have performed 3 50%
> water changes in last 7 days. Vac gravel at same time. Feed once every
> two days. Use de-Clor with replacement tap water. Ammonia level drops to
> 0.25 day after 50% change but increases to 1.0% after that. Run out of
> ideas. How do I eliminate the amonia.
>
> Thanks very much.
>

[IDzine01]

In addition to everyone elses questions...
Are you using a salicylate ammonia test kit?