I installed a Trevi 27' round about a month ago and have been using a Lomart Ultima 5000 D.E. Filter that was given to me w/1.5 HP pump. Over the last few weeks, I have been backwashing the pool once a week and adding 1.5lbs of D.E. (filter has label saying that's the required amount) each time I b'wash. Just had to backwash again this weekend, and now water pressure coming out of return seems to be low. Pressure on the gauge is above 5, but earlier this summer I was getting pressure anywhere from 10- 20 (25 is max for this filter). Pressure gauge may need to be replaced because it filled up with water recently.
I can't seem to find any info about this filter except part lists. Do I need to clean this out? If so how do I do it? I'm a pool newbie!! Only chemicals I used so far is 2 bags of shock + 3 - 4 chlorine tabs per week and arm and hammer baking soda every 2 weeks (12lbs). Pool water looks clean, but cloudy. Today there was some algea on bottom of pool which I cleaned up with brush.
Any help with this would be great!