Nancy Christian

Alright, Thank you for your help. =-)

The tank has been set up for about 3 months

Should I do another water change with RO water, or would that only do more harm this soon?

The salinity is at 1.021, I tested the nitrates and nitrites, both were nice and low. Right now i'm not sure what to do since everything seems to point towards the change being successful except for the lionfish's breathing which I am worried about.

Alright, I have a 20 gallon saltwater tank with a small damsel, dwarf lionfish, and snowflake eel. I do realizine that the tank is going to be too small in a few months and I am prepared for that. However, I recently perform a 50% water change on this tank last night using tap water since I had no distilled water on hand. I used a dechlorinator, the proper amount of saltmix, and made sure the temperature matched that of the tank. This morning, I noticed the lionfish breathing rapibly and being very lethargic in its movement. I am planning on running to RiverCity to get some of their reverse osmosis saltwater, however, I am afraid that by performing another water change, I may be putting my fish at higher risk. Should I wait this out, or perform another water change tonight? If I perform the water change, what percent should it be?