I'm fixing to order a sump pump in a week or two and I can't decide to go internal or external. I have a custom sump with thick sides and while I could drill it it would be easy to just throw a internal in it. :bowdown:
a sump for a 55 gallon wont require too much turnover so on them I use internal instead of doing any drilling.. To me its just not worth drilling the tank for 400 to 500 gal per hour that would be going through it..:D
