Glass information

[Parzifal]

Anyone know a good website which will tell me the differences between diamante/opticlear/starphire/other low iron glass?

It seems everything is oriented around starphire but i have heard rumors that some of these others have a higher clarity % than starphire and i would like to know the drawbacks.

Are they weaker? stronger? How much more expensive? Is there even a difference??

[noahm]

I think you might be best served speaking directly on the phone with a dealer of multiple brands, or an aquarium builder that uses multiple brands, but I doubt you would be able to discern one from another as far as clarity goes, unless they were right next to each other over a test color chart. I would be more concerned about the strength than paying for some undetectable .5% difference in clarity. The low-iron glass is pretty darn clear in general.