I would ditch the lid you have over the drip tray of your wet/dry sump. Then, mount your PVC pipe so that it is rigidly mounted over top the drip tray, but is not too close so that you can get some sort of poly fil pad to sit in the drip tray. Then, your drains won't be too close and you will have an easily removable filter pad that you can change out often. The poly fil pads are really cheap and you can buy them in large rolls that you can cut new pieces out of. I think this is the best option to get your current sump in better working order.