I'm not sure if many people are going to have the experience of keeping
Sewellia sp. 'spotted' and
Pseudogastromyzon cheni together, because of the limited exports of the
Sewellia sp. 'spotted'.
Mine are much bigger than all the other hillstream loaches in my tank, and at feeding times can be very dominant, particularly towards
S. lineolata and
Gastromyzon ctenocephalus, should they venture into their domain (the food usually spreads around and the
Gastros feed at the other end of the tank most of the time). But I've never seen them doing any serious harm, just the odd bit of shoving and topping. The
Annamia normani are the most feisty though, they will see off the Spotties which have considerably more girth than themselves, which as you know are quite slender.
Still, you would expect to find some evidence that the
P. cheni had gone. Is there any way they could have got drawn into the filtration/powerheads? And if something like that had happened, you would expect the water parameters to be off, which they aren't.
Very strange. I hope you get to the bottom of it.
Emma
