i think youre after my heart. when i was new to the hobby i had some silver dollars that were around 3" in a 55 and that didnt last long. those guys would slam into everything... from left panal to right panal at full speed sometimes. never again and i always advise against silver dollars in 4' tanks now.
Funny though i hated them when i had the metyniss fasciatus i moved them from a 150 to a 55 gal for a while and they were never really skittish ....still hated them though
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