Coco Coir Nutrients help

Hello ,
My plants are in week 4 of flower.
They are in 5 gallon buckets with a coco coir / vermiculite mix under 600HPS.
I use RO water and use American Hydroponics Nutes , the whole line.
I have been keeping the PH around 6 and the PPM around 700.
My question is , can I up the PPM to get better results ?
I have read on this board of people up to 1100 PPM , but that might have been in a hydro systems.
Can someone please give me a good PPM for the rest of the grow (week 4,5,6,7,8,9) please.
around 8 or 9 , depending on Tris , I will flush for a week with RO water.
Thanks

Yes. I have a system where I will slowly step up my nutes through veg--> transition--> early flower --> peak flower/bloom--> then start to slowly step down during swelling and late ripe. I have quite a mis-mash of nutes from Canna, Soul Synthetics/Roots Organics, Botanicare and Dyna Gro so I wont get into that, but at my peak I am hitting 1000-1100 ppm. Right now I am full swing stepping down (7 1/2 weeks into flower) and have just today gone back under 700 for the first time. I also do not use RO water ( it is not recommended with Canna anyways) and I do not flush, though my PPMs are fairly low the last week before chop anyways.

I dont know anything about your nutes and I also dont know which calculation scale you are using for your PPMs, but I hope this helps.

if you havent purchased all these nutes yet, ive heard of sucess with mixing a handful or two compost with the coco, and letting the plant and soil do its thing

Check the ppm of your runoff. If it is is near the same as when the stuff goes in, the plants are not eating much.
If it is significantly lower, they are eating a bunch. If it is higher, you should back off a bit and maybe even do a flush.
Listen to your plants and never, ever listen to the guy above me, bmeat.

LMAO. thats some good advice trousers, minus the last comment. ill rep you for that

psych.....