Some have said don't use the 100g rubbermaid stock tank as a sump because the stock bulkhead has problems. Is this so? If so, can the problem be fixed?
i also use a 100 gallon rubber maid but my sump drains into it and I use it as a fuge with 200 pounds of live rock. What I did was fill in the stock hole and drill another and added my own bulk head! Haven't had any problems at all!
Some people use the stock bulkhead and add a ton of sealent. I personally bought a 1.25" bulkhead and used my dremel to grind the opening just enough to get the new bulkhead to fit. I also have many friends that have done the same thing. Its very easy and works great.