I see that everyone here obviously prefers building their own sumps. I have a question though: I have never built anything like that and I dont know if I trust myself to build one that wont leak. I will go for it if its that much better, but whats wrong with the megaflow sumps? They seem to be pretty large, have a good size area for bioballs, you can put in your own mechanical media, room for heaters and whatever else, etc. So why should I build my own instead of buying a megaflow? Besides money I guess, because theyre more expensive, but is that the only difference if I was going to build a comporable size sump myself?