Choosing between a Koralia 4 and a Nanostream 6045

[Myka]

I worked for a short period at an LFS recently, and there were a TON of Tunze Nanostream returns. There was literally a HUGE box filled with them to go back on warranty work. Some of them ARE noisy, and need to be replaired, some break the propellers. I won't buy one. The Koralias are great for smaller tanks with thinner glass.

[Northreef]

I have a 6025 and the bracket broke and also the propeller cage won't stay on all the way. I'm about to try the HK.

[mseepman]

Where can I get directions on cutting the shroud on the 6025?