What is the difference between all the different types of bacteria?

All of Sanco's bacteria is formulated to break down organic material, muck or sludge.  Our liquid pond bacteria is simply a maintenance dose.  The pond bacteria spikes are the most concentrated.  The spike design is also beneficial because the weight and shape of the spike will insert itself deep into the muck.  The spikes are recommended for recreational areas that have become unusable due to muck build up.