Keep in mind this is a very short-lived

Designed specifically for use in shallow water

If you don't have power conveniently near the pond

and 1 to 1

and 1HP units

2500 Beneficial Bacteria System Pond Treatments Keep in mind this isThe 2500 system is like a time release beneficial bacteria capsule for your pond or water garden. Unlike traditional bacteria products in liquid or powder form, the 2500 takes care of dosing and treatment for a full month at a time. Meaning there's no need to remember to add bacteria every few days for it to work well. The system uses water soluable packets which release good microbes into a pond for a full 30 day period. Simple replace the packet