Ok for transport Jim had some 28"x18" rubbermaid tubs one in each with battery air pumps and they were in the car for 1:45hrs and then I drip acclimated for 2 hrs and in they went.
I don't think my bb died since I just pulled all 20l of pond matrix out and tossed it in the tank with 2 air pumps on the sponge filters.
The tank can probably handle the bio load since I just got rid of 5 big p.bass, 1 African pike, 1 pike cichlid, 1 blood parrot, 1 massive ornate birchir. Only thing left are 4 gar and an African pike.
The reason I don't think ammonia has anything to do with it... They are spots, it didn't affect the whole ray or even a whole area on the disc. They were isolated blisters that would pop and then fall off in a nasty piece. Under the blister, the rays disc would look perfect.