Well here I go being contradictory again
I water my trees once a day, every day in the morning. That includes ALL of my pines, every single one (JWP, JBP, Mugo, Scots and Pitch pine).
If we really start to get hot here, I may go to 2x a day (morning and 2-3PM).
Whoever told anyone that pines get watered 2 times a week was an idiot because that will kill any pine that is out in 80+ degree weather.
Most people water JBP at least once a day not 2x a week. Of course this also depends on the soil mix used.
I also use akadama in my mix once I get my trees into smaller training pots. It does not turn to snot here.
My mix for large training pots is pumice, lava and gravel in equal parts.
My mix for smaller training pots is pumice, lava, akadama and gravel in equal parts
My mix for regular bonsai pots is pumice, lava and akadama.