Let's talk food a bit.
This is all I'm using. Bloom and Boost together make up the base, Awesome Blossom are the micronutes, and then Cal/Mag. You can see my Top Fin Chloramine treatment in the back left. I also treat all water with SM-90 to keep my root bug problem under control.
2/4/2011 was the day the plants went 12/12 and at that time were on full strength veg nutes. For the first 5 days I topped the tanks off with pH water and full strength Cal/Mag (it's the same dose for vegging and flowering) while weening them off the veg nute mix. On 2/9 I did a full water change using the 950PPM formula and full strength Cal/Mag.
After the water change was over, I mixed up a new bucket of the full recipe at 1700PPM, full dose of Cal/Mag and this time a full dose of Awesome Blossom. I keep an airstone running and use this bucket to top off my tanks (1.5L/day) which gradually is raising my PPMs as the plants drink more. I'm sure I could push faster but the plants are so fucking happy I'm just going to maintain the status quo.
Remember the Aesops fable about "The Dog and The Bone?" I'm one man who's quite happy with what I have and am not going to be greedy.
Now here's the beauty of using small tanks. Unless something bad starts to happen, I won't have to do a water change. I'm replacing 1.5L/day in 8L tanks which in essence is changing the water every 5 days. As long as my PPMs stay consistent throughout even with the addition of water, I can assume they are eating and drinking everything equally and not creating any salt buildups in the water.
So my last interesting tidbit for now. How do you measure PPMs that are 2300 (1700PPM nutes + cal/mag + awesome blossom + sm/90) using a meter that can only read 2000? Answer: Take 100L sample of tank water and mix it with 100L of tap water (with a known PPM) then take a reading of the mix. Then use simple math and a bit of algebra to take the difference and recalculate the ratio.
peace