It's a .5 holding only 3 assassin snails so I only use a turkey baster to clean and siphon. I cleaned it today for about an hour (disrupting the sand and vacuuming them all up). No there was no moss ball in with them, the only live plant is salvinia and I know they were on salvinia in my betta tank which is why I think I transferred them to the snails.
So, the snails ate today and I'll try to starve out the planaria. I'll bait them in a few days with the bloodworms again. They seemed to ravish those today! It was gross to watch the snails and worms eating together lol