I discovered that I introduced a guppy with what seems to be a clear case of columnaris to my community tank. I removed the gup along with the two other guppies she came with within 8 hours from the tank. I have a breeding pair of Apistogramma Cacatuoides in the tank along some Norman Lampeye. I lowered the water temp to 23C and will do a gravel clean and water change tomorrow. Is there anything else I should do?