OR more than normal anyway. I have a CYA of around 55 and this time of year I get direct sun on the pool most of the day since the leaves have yet to create the usual shade environment we normally have. Also right now we have a large amount of that yellow pollen falling into the pool as well. Will that cause the increased use of chlorine also? What would you consider normal usage for this pool in these conditions? It is an 18000 gal 27 round. It just seems that I am having to add bleach regularly to keep it up. I am not aware of how the direct sun affect chlorine use in the pool since we put it inn last july and had practically full shade then.