I just got a new betta yesterday from petco, I didn't have a ton of money, but I got him a 1.5 gallon tank. I have 2 concerns about my new betta.
He's red and sometimes he looks black, but there's a bit of black at the tip of his tail, Is this fin rot? Also, He has a transparent line through his tail, kind of like he had fin rot and his tail grew back. Should I be concerned? He's very active
OK, also, When I went to petco, the label said he was a plain veiltail betta, but I think he's a delta tail, because his tail looks nothing like my other betta's tail.
ALSO, I have a one gallon tank for my other betta, Sushi and I took him out and put him in the bigger tank because he's a bigger fish and I figured he would like the space. He acted all depressed, he wouldn't swim out and let me see him, he hid in the plants, and he didn't eat, and I didn't see him all night. When I woke up this morning, he was still hiding, so I decided to switch him back into his old tank and put the new fish in the new tank. Apparently, he likes this a lot better. Don't they usually like more space? I felt so bad for both my fish, because switching them is so stressful.
Is my betta a veiltail or a delta tail, also, is this fin rot? And what should I do about my other fish?