Fallow Tank - Need Sand Maintainers

[atonaltheory]

DT will be fallow for next 12 to 14 weeks due to velvet problem. Its been five days and the sand already needs maintaining. Any suggestions? Obviously the new additions can't be susceptable to fish parasites.

Thanks for your suggestions.

 

[b0bab0ey]

A fighting conch & nassarius snails are all I've ever used.