I bought a juvenile German Blue Ram from my LFS last Saturday. He's been doing well until this morning. I did a partial water change yesterday. I changed about 1/8 of the tank water, added Seachem Prime, and was careful to match temperature. Today, the GBR is sitting in one place moving his mouth fast. He has been like this all day. I'm not sure he'll make it. 
Can anyone tell me how to do a partial water change without upsetting the GBR? I really want to keep one, but I don't know what I've done wrong. I appreciate any help.
Tank details:
15 gallons
Other fish: 2 otos, 3 harlequin rasboras, 4 pygmy cories, 1 nerite, 3 assasin snails
Lots of plants and hiding places
Temp: 80, Ammonia: 0ppm, Nitrite: 0ppm, Nitrate: 0ppm, PH: 6.8
I feed fluval bug bites, hikari sinking wafers, and tetra tropical flakes. This fish was eating well until today. :-(
Can anyone tell me how to do a partial water change without upsetting the GBR? I really want to keep one, but I don't know what I've done wrong. I appreciate any help.
Tank details:
15 gallons
Other fish: 2 otos, 3 harlequin rasboras, 4 pygmy cories, 1 nerite, 3 assasin snails
Lots of plants and hiding places
Temp: 80, Ammonia: 0ppm, Nitrite: 0ppm, Nitrate: 0ppm, PH: 6.8
I feed fluval bug bites, hikari sinking wafers, and tetra tropical flakes. This fish was eating well until today. :-(
