Anyone know what type of algae is on this guy? I have 6 of them and most are clean except for this one. Should I be concerned? I’ve tried blasting it off with a baster but it’s on good. Ammonia and nitrate are at zero
I'd use a brush of some sort on it. Extreme measures I'd take hydrogen peroxide and dilute it and with the meat of the snail upwards brush down with the mixture. Insure it doesnt touch or irritate the snail itself. That would be the extreme route though.