What's your highest ppm reading without burning plants.

Howdy folks,
I was just curious about what other people considered a strong dose of fert. I know it can be very strain dependant, but what kind of ppm reading would be considered an extra strong feeding? I am about 3 or 4 days from 12/12 and am looking to give my ladies a nice kick in the pants. I am all organic and I usually will make a yummy guano type tea a couple of days before. My strong teas normally start at around 900ppm and when finished will be around 3000ppm. I then dilute this to around 500ppm then water. The plants love it, but I would like to give them extra. How do other people mix nutes, and what kind of ppm range to you look for?

I make my tea earlier tonight. Incase anybody is courious here are the ingredents.

5 gallons ro water
5

Oops...I must have hit a wrong button....lol
anyway...where was I....oh yes
5 gallons RO water
5 TBSP Earth Juice Grow
4 TBSP Earth Juice Bloom
5

Oh my god I did it again.....One more time hopefully I will get to finnish.
5 gallons RO water
5 TBSP Earth Juice Grow
4 TBSP Earth Juice Bloom
5 oz Maxicrop seaweed
4 TBSP worm castings in nylon sock
1.5 TBSP Seabird Guano
1 tsp Jamaican Bat Guano
5 TBSP Earth Juice Catalyst

I combine all ingredients and the aerate with an air stone and pump. Wait two days and its becomes alive and will be ready to serve your plant. I normally will put about 1 gallon of tea to 4 gallons of water then ph then water.

Hmmmmm, sounds yummy, wish I had all the ingredients.