Von Rios Swimming Funky

So, just wanted to get a second opinion from the fishlorians...

5 Von Rio Flame Tetras were picked up today along with 2 gold rams. 2 tetras are swimming in a jerky, 45 degree angle way, like they can't just suspend themselves in water, they have to keep twitching along or they sink. I called the LFS- they said it was probably the result of something very different between the two waters. He ran through the basics, ph, ammonia, nitrite and nitrate, all good. I turned their lights off and tried to give them a shelled pea. Anything else I can do?

 

Oh, also they seem to be reasonably active and alert.

 

Can I get any help on this??

 

How did you acclimate them?

Also, were they swimming normal at the store? Seems odd that they would start swimming funny once home.

 

I acclimated them by floating them for at least 40 minutes and every 5 minutes or so I would add a little water. I was extra anxious because I was also acclimating gold rams, and based on their reputation I was expecting them to up and die any minute, lol! So due to that, maybe I cut my corners a bit, and added to much water at one point for the tets?

I noticed a little jerky swimming at the store, but not consistently- (They, as a rule, have a darty swim pattern so it didn't look too unusual) although when we got home, they were freaking out so bad- when they were acclimating one of my friends called me over beacuse she thought one had died. Most of them look extremely happy- one of the two's swimming seems to have improved, the other hasn't gotten better.