prefiltering a SCWD on a closed loop system

J

jojo727

Guest
as most of you know the SCWD on CL has stopped switching and this is because i havent had a prefilter on it. the problem is the intakes of the CL is hidden under the rock pile, so it's hard to gain access to. so i'm trying to come up with a way to prefilter the water before it gets to the SCWD, the first thing that comes to mind is inline filter but the closest thing i can find to that is this filter. but it would be hard to change those out being under the rocks.
any ideas?
here's pics of the set up to give an idea of the set up



 
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