3 - other Syno’s / 2, 1” , and 1, 4”Probably stressed. What are it’s tankmates?
Yes to the lights off. Would hold off on the lights. Got plenty of hiding spots?
3 - other Syno’s / 2, 1” , and 1, 4”
4 - bristle nose 1”-3”
22 - 1” Victorians ... (2 species)
salt / lights off?
What type syno? Do you have any idea of tank hardness?
You mention it used to have wood which would make me think it was ph less than 7 and possibly softer water. Now looks like ph greater than 7 and potentially hard water?
Did you recently change the decor/setup?
IME this species, S. lucipinnis (generally sold as petricola) are like canaries in a coal mine, and outside of pre-spawning behaviour, the activity that you describe is often stress from water parameters. Not to alarm you, but I once saw this behaviour when an unknown toxin had been introduced in to a tank, where the synos were first to react. Within hours almost all fish in the tank were dead, including several other species. Hopefully yours is just feeling his oats!My 3” Syno seems to be swimming laps, taking a breath from the top every lap.