Hi, I'm confused about zebra snails. I've got about a month old 125l (33 galons) tank and lots of algae. I'm not sure if they are caused by LFS water that I added with fish or from fertiliser. I added both at roughly the same time so I don't know what's the cause. Anyway, I want to get rid of them. In the store they say that zebra snails Neritina natalensis are the best. What I'm not sure is stocking. In the shop they say only 1 snail per 50l (15gal?), on websites I read things like 1 per 5 gal, someone has 8 of them in 33 gal. On the shop site they say they only eat algae and refuse all other food so I'm afraid if I buy too many they will die of hunger but if I buy few they won't eat enough algae? I would like to get the right amount straight away because there are no snails locally, I must order them online and shipping is 3x more expensive than snails. Thank you for advice.