* If you don't get lost forever trying to find the CP book section ;)
pH of water can easily be lowered by adding a tsp. or two of distilled
white vinegar. You will need a simple pH test kit (avail from aquarium
supply stores) to determine your 'before' and 'after' pH levels. This is
cheaper than using the pre-packaged 'pH down' solutions available from
hydroponic suppliers.
Yassir