Welcome to the forum

1.) The LC Display is working with a backlight. That means you won't have a real black ground; it's more a little shiny green-grey.
The OLED Display has no backlight. Only the necessary pixels will light up and you have a really dark black ground. The contrast and angle of view is much better.

2.) The PnC inline-sensor is designed to plug it into an PnC connector. You could use this adapter but it will only work with PUR tubing or any other stiff tubing.
If you own a aquatube it would be very easy: just order a normal PnC connector.

3.) There are two ways for shutting down the system: via PSU or the power switch of your mainboard.

For both methods you need will need this relais plug.

If you want to use the PSU method you need the aquaero power connect ATX-Standby-Adapter 70 cm.

It has an extended green power good cable. You split it up and connect the ends to your relais plug. When the aquaero wants to shut off the system it will disrupt the line and the PSU is shut down immediately.

The other method with the power switch requies no additional accessory but you will have to tinker a bit

It should look like that at the end:



If the aquaero wants to shut off the system it will "press" the power button and the computer will go off after around 2 seconds - like you would press and hold the power button by hand.

You can get the plexiglas for your aquatube if you order it via the comment field at the end of your order, afaik it will cost 4 euro.

1) The OLED is only available in green. However, using the VFD you would be able to achieve almost any color, by the use of simple color filters.
2) Why don't you just screw this into the aquatube?
3) Notice, that at the moment, there is only a 20-Pin ATX Version of the cable.

Oh, and to avoid doubleposting you can use the edit button ("Bearbeiten").

Yes.

You can also use the PSU method. Get a ATX-24 extension cable (from an other shop) and extend the green power good wire.