Well if you have been wondering where Claude has been hiding for the last month or so, this may explain a few things.
This is a monumental size build of an acylic system in Romania.
Tank details
complete special 80 mm acrylic with low density to give 95 % light through the glass ( Optiwithe glass has 78 % )
the tank has 4 x 2 x 2 m in elliptical form
Special waterflow through 8 Holes in the middle section ( 51 cm diameter )
airflow 120 mm in the middle for the climacontrol over the section
Here you can see trough 2 m high acrylic.
like you see there is no coloration in the material
This for aquarium produced special acrylic is the best material which is available at the moment.
More to follow