Next Sand Performance

NextSand is an amazing product as long as you first get it clean and going forward make sure you have adequate backwash flow rate. NextSand acts like a depth filter. It is a mono bed of 36” on top of a standard underbed of ? X 1/8” material (garnet, river rock or pea gravel, or #6 sand). The media is hydrophilic so the water flows through the crystal structure. This is what gives it the great filtration properties down to 3 micron. The fact that the water flows through it also is the reason you need a higher velocity for backwash to expand the bed between 30 and 40%. You do not need more water, in fact you should save half the backwash water over time due to the very high dirt loading capacity. Just backwash when your pressure drop across the bed reached 10 PSID.