nassarius snails vs. fighting conch

[bpro32]

I need something to clean the sand for my 120 and I was thinking of getting either 15 nassarius snails or 2 fighting conch.
Also in a 20l 1 fighting conch vs. 5 nassarius
Thanks in advance

 

[nycbob]

i'd get 3-4 conches over 20 nass snails. conch seems to move a lot more than the nass snails.

 

[coralreefer]

if you decide to go with the conches, get more than 3. i have 6 in my 75

 

[copperhead3690]

i've got 1 conch for my 24 and i've not seen a lick of algae... i'd go with them honestly, as for quantity... no clue