Hey everyone, so as some of you know I have a lot of tanks in my fish room. I'm suddenly having a problem in one if my 125 gals. That I've never had yet with this tank. It's my American cichlid aggressive community tank and it holds a male salvini (8 inches), a male convict (5 inches) , a large presumable male firemouth (7 inches!), a female jack dempsey (7 inches), AND my Texas cichlid which is either a carpintis or a hybrid between carpintis and cyanoguttatus. He's just recently hit the 10 inch mark and something seems to have snapped. I know I have quite a lot in the tank, but that's why I'm running 2 fluval 406 canisters rated for 100 gallons each along with an Aquaclear 110 power filter. They were raised together since they were all under 3 inches (except for the firemouth he's an old guy). Up until now texas never cause problems and was honestly a wuss when he was younger. He was easily intimidated and never caused problems and the tank was actually extraordinarily peaceful once the salvini took the roll of "top dog" and kept everything in line. They've lived in peace like this for a year and a half and now suddenly the Texas decided he doesn't want peace anymore.. He wants all out war. Nothing has changed, the set up and decor has been the same for a few months, my water parameters are exactly where they should be like always, the food is the same, the fish are the same..but the Texas is going NUTS. He's chasing and biting all the other fish chasing them all around the tank making splashes everywhere, the dempsey and convict are hiding in caves or at the surface, the firemouth is thinking to himself " I'm too old to have to put up with this crap" and the salvini is the only one fighting the Texas back. And I must say, the salvini isn't going after any other fish except for the Texas whenever te Texas tries to attack him. The fighting between the two of them has gotten so bad I had to put a divider in. Now that the Texas is blocked off by himself, the salvini is perfectly peaceful with the other fish and there all fine except for some ripped find caused by the tex... The Tex on the other hand is constantly biting the divider trying to break through and attack the others... What they heck happened to him he's never been aggressive at all till now and he was one of my favorites. Now he's acting like the biggest baddest Red Devil out there lol. What could have triggered this? The only female fish is the dempsey so at first I thought maybe he wants to breed with her but he has been just as hostile towards her as he was to the others. I just don't know what to do. I knew Texas cichlids could be belligerent and territorial but nothing like this.
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