"Snoddie" wrote ...

Summer Algae.

Remedy water soluble food dyes (E133), non toxic to fish, however
underwater plants will be effected as they cut out UV light.

Caution please makesure that you use "food dyes" as other dyes could
cause damage to the pod life - all food dyes have preceed with E, I have
suggested E133 which is a blue colour.
This dye will hold its colour for approximately 1 month before fading.
Reputable sellars will be able to provide a "Material Safety Data Sheet
- MSDS".

Blue frogs anyone? :-)

--
Regards
Bob Hobden
W.of London. UK