Why don't DE filters have a cool transparent housing?

[aharon]

I see that some filters for small above-ground pools are made of plexiglass, and they do use the transparency as a selling point, you can see when a cleaning is needed. But why don't big Hayward DE filters, for instance the 24sqft grid for my 22k gallon in-ground, or other major brands, why do they still make me guess what is happening inside the shell, using only a pressure value? If I could just see inside the thing, I would have a much better understanding of what's needed, for instance I could confirm during opening that a load of DE needs to be brutally backwashed because of the huge amount of dead algae making a matrix, or if just a bump will do....and if I can get 1, 2 or 3 bumps out of a load before committing to a backwash.
Not to mention my kids...ok, me... would think watching the action inside the filter looks cool.
Is the problem with materials? Like there's no transparent plastic that can safely contain the pressure inside?

 

[TinFoilHat]

I agree that it would look cool to watch it in action. Heck, it took 40 years before we got a washing machine with a clear lid. It's because the pressure inside the filter is the best indicator of it needing to be cleaned. When the gauge rises 25% higher than the clean filter pressure, it then needs to be cleaned. No visible testing is needed. My first in ground vinyl pool had a bump handle filter on it too and I could always get extra filtering by bumping it but eventually the pressure would get too high and I would have to backwash it.

 

[Bperry]

I see that some filters for small above-ground pools are made of plexiglass, and they do use the transparency as a selling point, you can see when a cleaning is needed. But why don't big Hayward DE filters, for instance the 24sqft grid for my 22k gallon in-ground, or other major brands, why do they still make me guess what is happening inside the shell, using only a pressure value? If I could just see inside the thing, I would have a much better understanding of what's needed, for instance I could confirm during opening that a load of DE needs to be brutally backwashed because of the huge amount of dead algae making a matrix, or if just a bump will do....and if I can get 1, 2 or 3 bumps out of a load before committing to a backwash.
Not to mention my kids...ok, me... would think watching the action inside the filter looks cool.
Is the problem with materials? Like there's no transparent plastic that can safely contain the pressure inside?

Sunlight getting through a filter would make a nice environment for growing an algae farm.

 

[Newdude]

I imagine it's pretty turbulent in there and it might ruin the view so to speak.

I also wonder how quickly the plexiglass would haze up like headlights. The dome would take direct UV with it facing upwards.