Changed out DE filter grids, now seeing sand in pool

dclynds

Well-known member
Apr 29, 2016
84
Houston, TX
Pool Size
17500
Surface
Plaster
Chlorine
Liquid Chlorine
I replaced my DE grids 2 weeks ago and recharged with 10 scoops DE (48 sqft). Been noticing some sandy material on the steps near one of the returns ever since. Just now drained the filter and checked it again and it looks like I installed it correctly, but I notice what seems like beach sand on the top of the manifold. That couldn't be DE, could it? Seems too coarse. What the heck is it? Suggestions? Advice? Sweet nothings to calm my nerves?

FC = 5.0
pH = 7.8
TA = 85
CH = 375
CYA = ran out of testing material...
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dclynds

Well-known member
Apr 29, 2016
84
Houston, TX
Pool Size
17500
Surface
Plaster
Chlorine
Liquid Chlorine
I am using hth D.E. Filter Aid. This is the same material I've always used and never noticed a problem before. The material on the filter grids is definitely the very fine D.E. material you would expect. But I do not understand why there is coarse material on top of the manifold and why there is material settling on the steps by a return. Any advice?
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