"Ali Day" wrote in message
...
| Sorry should have put this in my last post. Whilst reading through
the
| documentation for the Rena Filstar XP it came with a bag of
activated carbon
| and it said that the filter must have a bag in place and changed
every 4-12
| weeks. Now I only use carbon to strip old medicines out, and I
thought that
| leaving a carbon pouch in the filter will eventually leech
phosphates into
| the tank giving a high chance for an algae bloom. Which is correct?
|

Most aquarists agree carbon is not as crucial as the marketing firms
would have you believe. I have not used it for years, except to
remove medications from the water as you mentioned.

billy