I just bought a pair of kuhlie loaches, they seemed to be breathing hard in their bag (traffic is insain, took me about 45 minutes to get home) so i rushed them into the tank. i only let the bag float for about 10 minutes. I put them in my 5.5 gal tank that has a betta and 15 or so 3 day old molly fry. i do a 15% water change about every 3-4 days. When i put my kuhlies in the tank the swam about sporaticaly and then would just kinda sink to the bottom, often landing on their sides or totally upside down. its been a couple hours and one seems to be doing a little better hiding in the clay pot i have in the tank. the other one seems to be struggling a little more. its been about 3 hours and they are both still breathing very heavily. is there anything i can do for them? what could the problem be? I did a water change about 30 minutes after putting them in. how can i help these little guys?