Whoaaaa, impressive community ^^ silver aros with no apparent DE =P how big is the largest silver? And paima? Wow, you have 'white rose" variety (as they call them in thailand)
Tank size is 6 x 2.5 x 2.5 footer bare tank. Resting on the floor with foam board underneath. Run with a 6 footer stackable filter with just lava rock/volcano chips and some CR as bio media. Water change once a week of 40% with water conditioner added.
These silvers got no droop eye. No secret. I collect them at different timing last year and ever since I have been keeping them together. Initially there're some fights but over the time they dont seen to fight anymore. Currently, I guess the biggest should be 2 feet? Didnt take them out to measure before.
I got a 5 feet NAN light fitted in the tank with white FL inside to replace the original TFC. Light is on 24/7.