Is there a way to get a picture of said ulcer? And are you sure it's not a bite wound?
You don't want to do a 100% in a tank that is set up with a filter- what you would want to do is remove the injured fish and use the 1 tsp per gallon aq salt, daily 100% water changes for no more then 10 days to make sure the wound is clean and bacteria doesn't set in and infect it.
Definitely get more females asap.. as even though they are spawn sisters, their natural instinct is to be alone, and if not, set up territory. Having just the two will lead to problems. Unfortunately, sororities can be hard to maintain.. they may be fine for a while, months, a year.. but they tend to break down after a bit regardless if they are spawn siblings. Girls prefer to be alone when it comes to other bettas- we just do our best to give them a chance to get away from one another by adding in a lot of plants.. and I mean a lot.
Careful with the snails- the 3 will turn into dozens and they have huge bio loads. Would recommend bringing that number down to 1.
Do water changes daily in the home tank of 25-50% for the next few days- to every other day to remove the AQ salt from the water without hurting the cycle too much. Over exposure to AQ salt can lead to kidney/liver problems and failure.
Good luck with them.. if you have any more questions, please feel free to ask.
You don't want to do a 100% in a tank that is set up with a filter- what you would want to do is remove the injured fish and use the 1 tsp per gallon aq salt, daily 100% water changes for no more then 10 days to make sure the wound is clean and bacteria doesn't set in and infect it.
Definitely get more females asap.. as even though they are spawn sisters, their natural instinct is to be alone, and if not, set up territory. Having just the two will lead to problems. Unfortunately, sororities can be hard to maintain.. they may be fine for a while, months, a year.. but they tend to break down after a bit regardless if they are spawn siblings. Girls prefer to be alone when it comes to other bettas- we just do our best to give them a chance to get away from one another by adding in a lot of plants.. and I mean a lot.
Careful with the snails- the 3 will turn into dozens and they have huge bio loads. Would recommend bringing that number down to 1.
Do water changes daily in the home tank of 25-50% for the next few days- to every other day to remove the AQ salt from the water without hurting the cycle too much. Over exposure to AQ salt can lead to kidney/liver problems and failure.
Good luck with them.. if you have any more questions, please feel free to ask.
. The tank is very heavily planted with silk plants and has a few caves.
