I'm using aquatic compost from the local garden centre.

Peter

"Sean Dinh" wrote in message
...
If your potting media has high cation exchange rate like clay, it would
bind the
fertilizer. The fertilizer has little chance of dissolving into the water
column.

2pods wrote:

Sorry to hijack the thread, but while we're on the subject of lillies, is
it
possible to harm pond plants by using lily tabs ?

The consensus seemed to be OK, but after one big tab the plants seem to
look
worse.
A bit floppy and "dry" looking ?

Peter