Oh yes it's definitely a balancing act when you have them in your tank. My 29 was where ramshorn domination was taking over. At its worse it was like I had a substrate of snails not gravel. In a 4 hour time period in one night I used sliced zucchini and green beans and took out over 400 snails. So I amassed a platoon of assassin's snails to help dispatch them. It took a little while but over a couple of months between the veggies and the ninja snails eradicated the situation