Just about anything can clog, so redundancy is always a good idea. I've used what I suggested and never had any problems with it. Obviously, the fancy intake he's using isn't working with the flow of the pump.
Yeah, if you shove a cap over the kind of overflow he is using. Honestly, look at it. It is round kinda like a C-Y-L-I-N-D-E-R. Honestly dude, some things clog a lot easier than others.
If you read the thread, his cylinder that you are so adamant about is the reason the tank overflowed. It's too restrictive. Honestly, dude, I wasn't saying to shove a cap OVER the existing. Either solution would be instead of the restrictive cylinder.
Wow. The intake screen seems to be the hot topic this morning. IF you want to get technical the open surface area of the screen needs to exceed the surface area of the opening in 3in PVC if you want ZERO flow reduction. IF you put egg grate in there you reduce the area. Holes in a cap reduce area. Take a piece of foot long pvc and run slits every 1/8 in or less.... The amount of PVC you remove by making these slits will probobly double the surface area of the open end of 3 in PVC. You would also be able to take a footlong tinfoil barb and stick it or even try to wrap it around the intake and more than likely if you made enough slits you won't even have reduction in flow.
You can either learn from other's mistakes or make them yourself. It's your decision. I know my floor has been wet plenty of times.... Who would think to account for dying fish? I had one fish clog an intake and the other fish died as a result. Considering the amount of water and the amount of $ in fish this tank is capable of holding it would be pretty sad to see a silly mistake like the intake tube cause such a tremendous amount of damage.