Hi,
I own 2 tanks, my first one was a 38 litre tank (i'm from aus

) which i used for some goldies and, then i purchased a 58l hex tank which was very nice, one of those blue planet tanks.
Housed 1 baby oscar in there (hex) for a few weeks and decided to upgrade to a 190l tank which i thought i got for a bargin price.
THere was only one problem, after having the first 2 tanks the glass was clear as day so i could see all my little fishes in all their true colours. When i got my 190l tank i was horified to see that it had a dark blue tint to the glass...
Initially i thought it was the gravael that coloured the tank as it was a darkish black colour. I then removed the gravel and only put water in the tank to see the colour, it was STILL Blue. i put a bright green plastic plant in there and it was a funny colour didn't look right.
Silly me thinking all tanks are CLEAR...
It looked clear enpty in the shop, even without water it looks clear.
Looks like i will asking for another tank.
Funny also when you look at tanks online for sale they don't mention the colour of the glass?... or did i just got what i payed for.