Help please. My 20 year old D.I.Y. sump just D.I.E.D. It split a seam and dumped several gallons on the floor. I got lucky. The split occurred in the return section so the water loss was limited. Anyway, I need a new sump. No DIY this time. I have a 4' 90 Gallon tank. The sump goes under the stand. I have a big old recirculating skimmer that I'd like to keep. My old sump was a Berlin Method with no refugium section. I have had thoughts of adding a refugium, so now maybe adding one into the sump would be ok. Any ideas for a sump? I'd like to stay under $400. Thanks.