"Franz Heymann" wrote in message
...

"Peter Stockdale" wrote in message
...


This problem is significantly reduced by using dark coloured butts.
My main outside "butt" (5000k gallons) also has a black polythene
cover to
eliminate algae totally.

I beg your pardon? That would be roughly 100 ft * 100 ft * 100 ft.
Some butt!

Franz


Sorry - just testing that you were awake Franz - the " k " is a typo. I
should have stated a mere 5000 gallons. Give me the volume measurement in ft
for this and I will verify.

Pardon me
Pete