I've got some cyrpts, swords, java fern/moss at the moment although I'd like
to get some new plants in the future.

"Kris" wrote in message
news:roNuc.7865$RK3.6073@clgrps13...
You have to ask the tough question don't you.
optimum time frame for a planted tank can vary depending on the plants
used.

I have had tanks that do very well with only 4 hours of artificial light
(2-3 wpg), and I have had tanks that required 12 hours

Also I have had a tank that had no artificial light, it was in a south
facing baywindow, exposed to direct sunlight (just a tiny bit more than
4wpg ) for roughly 5 hours a day, shaded during the strongest period
by the hedge outside. That one required pruning every week.

Can you tell us what type of plants you are looking at, and then I am
sure someone can give you a better idea.

Phil Williamson wrote:

What's the optimum light period for planted and non-planted tanks? What
can
happen in both cases if the light period isn't regulated and just turned
on
at different times each day?

Phil..