Breathing at top

[StarOrbs]

I currently have 4 neon dwarf rainbow fish, 6 Red Serpae tetra, 1 Syno Eur., and 2 Rubber Lipped Plecos.. Everything was fine yesterday but now ONLY the rainbow fish are breathing at the top. The rest of them seem to be breathing harder than normal.

Should I do a water change or what?

My water params are:
Ammonia 0 PPM
Nitrite 0 PPM
Nitrate 5-10 PPM
Ph was 6.8 a few days ago and has lowered to 6.5 since I upped the CO2 mixture.
I haven't changed anything in at least a couple days so I don't whats going on.
My kh is like 2.4 so my CO2 concentration is about 22 and I've read there shouldn't be any problems till above 30.

 

[StarOrbs]

I checked my nitrite again and it was .1 so I'm doing an immediate water change.

 

[fishwatcher]

If the water change doesn't help, I'd add a little more aeration via an airstone or lowering the water so the filter makes more of a splash. That'll add some oxygen.

 

[StarOrbs]

They seem to be doing better now.. I don't want to add an airstone because my tank is planted.. Either way my plants are starting to pearl again so that should help.

 

[IMCL85]

Too much co2?? some time it will occour will co2 is off the chart and fish will swim up to the surface for oxygen. So just toss down a pump or air stone and they befine.

 

[StarOrbs]

I don't see how it could have been too high it was like 22 PPM. Their doing better now so I feel better.

 

[fishwatcher]

Glad to hear it!