I have been using a Hayward EC-50 DE filter and a Hayward 3/4 HP pump on a 20,000 gal in-ground pool for 35 years. This system was installed by the original pool construction company. It has worked very well and has given me absolutely no problems. The filter housing has now developed a small crack, which produces a relatively minor leak (so far). While researching possible solutions, I noticed on a number of websites that this system is recommended for above-ground pools, not in-ground pools. I could just replace the filter housing for around $300 and continue on with this system. Or I could replace the entire system with something larger that is recommended for in-ground pools. Obviously the cost would be a good bit higher for the new, larger system, but it might be worth the cost instead of "patching" the old system and waiting for something else to fail. Any thoughts out there on this?