Against my better judgement, I used back to blue upon reccomendation of my local pool store. I cannot get this floc vacuumed up. I have vacummed twice and its a little better but, not much. The skimmer plate, wont stay down, so someone has to physically hold the skimmer plate down for it to vacuum a little. I have checked the impeller and we do have water flow when we turn to vacuum to waste. We did turn the main drain off. This is a nightmare and I STILL have an algae bloom and cant even run my filter. I have a 12000 gallon inground fiberglass pool with a Hayward filter. (don't know what kind)