how often should solution be changed

[Jason]

Dear Ron:

This is a great website! I have one question about the plans you give to start up a hydroponic garden.
Do you have any nutrient solution you would recommend and how often should that solution be
changed? Thanks again. I'm sure I'll be back. Sincerely, Jason Karnezis

[Ron]

I use a liquid hydroponic nutrient solution called Formula One. I have been using it for years because
I grow plants in all stages of growth from the same nutrient tank. You mix solution A to your tank
and then solution B through the vegetative stage and the bloom stage. Most hydroponic solution has
a two part mix Grow for veg stage and Bloom for fruit producing stage.
The only place I know of to get it is Worm's Way Worm's Way - Gardening Products, Supplies, Service, Support, and Knowledge Base for all your hydroponics, indoor, outdoor and organic gardening needs, year 'round! They have a store in
Indiana, Florida, and Missouri.
You can use any nutrient solution that says on the label that it's formulated for hydroponics.
The recommend time to change your solution is 5 or 6 weeks. I admit I don't change mine that often
but I like to see how much I can torture my plants just to see how good my system is at keeping
plants growing.
Ron