Originally Posted by Oldfishlady
Welcome to the forum.....
Most likely the problem is related to water quality and stocking....I would start by making some 50% daily water changes for the next couple of days...provided that your nitrate is less than 20ppm...if higher than 20ppm-you need to make 10% water changes daily and increase the percent by 10% every 3 days until you reach 50% and then 50% back to back and then 50% weekly with vacuuming in all places that can be reached without moving anything or disruption of plant roots thereafter to maintain water quality and safe nitrate levels...
If you have CAE-you may want to look at re-homing them in the near future....as they mature they stop eating algae and start sucking the slime coat off slow moving fish at night like the Betta.....
Are you on well water?....I ask because you posted that you use declorinator on an as needed basis...
You may also want to lower your water temp some-although 85F is within range long term it is best to keep it in the 76-80F range
What kind of live plants do you have?
With the symptoms-I would QT him in a small container that can be floated in the heated tank and start an Epsom salt 1tsp/gal (Not aquarium salt) along with 100% daily water changes for 10 days, however, I would get the water quality of the 10gal tank straighten out first so you don't shock him with any sudden changes and if he doesn't improve after that then I would start the Epsom salt treatment....
Thanks for the help.
I went ahead and did a 50% water change because the nitrates were lower than 20 ppm.
I tested the water and everything looks fine except for acidity. It says it is high. I have never seen that before. How do treat it?
I am not on well water. I have never had issues with the city water here. I check the water every time it was changed. Only on a couple of occassions, I felt that dechlorinator was needed.
This is the first time I have had any issues with acidity or anything else.
I am not sure of the name of the plants..
Thanks for the information about the CAEs. I did not know that. I will move them.