All of the CFM ratings for Can Fans and Max-Fans are certified by the Air Movement and Control Association International (AMCA) to be a true rating of the total cubic feet per minute moved, using several testings in different locations in the path of the air.

Basically, more air is moved around the rim of the fan (because the blades are moving faster on the outside) and much less is moved in the dead center. Other companies give you the "max rating" along the edge, while the Can Group gives you the real world rating that is used industry wide.

Check out the following chart. It will show you which filters match up with the standard Can Fan products.

You should also add the Micro first, and then allow it to ciculate. Then add the Bloom, and finally the Grow. Then you should check and adjust the pH your nutrient mix to the desired level. If you are using Plant Amp and Uncle John's Blend, add them last, without changing the pH.

Then you are ready to use your feed water on your plants!

All of our Global Greenhouse Lighting IntelliVolt ballasts internally convert 120 volt power to 240 volt without flipping any switch.  This causes a little more heat to be generated, which is normally dissipated using the built in cooling fins on the ballast housing.  When we ramped that up to the first ever (and still only!) multi-volt 1,000 Watt digital ballast, it caused more heat that we wanted our customers to touch.

Because of that, we included a heavy duty fan that is rated for 100,000 hours of industrial use!  That's 11.4 years of continuous operation, or 23 years of flowering!!!    The ballast is still completely sealed inside, so there is no worry about dust, moisture, or RF interference. We just wanted people to feel confident that their ballast wouldn't be too warm to comfortably move, so we included this very beefy fan.

The following products are permitted under appendix II of decree (ECC) No 2092/91 pertaining to the organic production method:

• Roots Excelurator
• Multi Zyme
• Bud-XL
• Bio 1-Component Soil (base nutrient)

Basically, this means that the European Union has said that all of the ingredients that make up the above products come from certified organic sources, which makes the product itself organic.

We are currently in the process of getting OMRI certification for these products, but this may take a year or more.

While some of the products like Roots Excelurator do have high MSRP's, they are the most concentrated nutrient on the market. As an example, Roots Excelurator's 500ml MSRP is $127.00 and is used at 1.1ml per gallon of feed water. This means that that Roots Excelurator costs LESS than 28 cents per gallon of feed water. Compare that to anything else on the market, and you'll see yourself how inexpensive House & Garden truly is.

In fact, we know how inexpensive House & Garden is compaired to Botanicare or even General Hydroponics that we created this chart. (150k PDF)

This is an error on the feed chart.  We have tested House & Garden extensivly in aeroponic, deep water culture, and ebb & flow hydroponic systems with great success.  We have done side-by-side test runs with two ebb & flow tables, where the only difference was the addition of air pumps in the reservoir.  There were no differences in the results.

Finally, we have tested Roots Excelurator in aeroponic cloners such as the EZ Cloner and Power Cloner with wonderful results.  So go ahead and use an air pump if you wish.

All of the A&B base nutrients in the House & Garden line have 11-12% calcium included in the "A" bottle, while both the Bio 1-Component and the 1-Component Aarde and designed for soils that have been amended with lime.

If you plan on using either 1-Component base nutrient, amend your soil with lime per directions on the bag of lime.

1) Fill your reservoir with reverse osmosis (R/O) water at room temperature. If you do not have R/O water, make sure you have clean tap water (under 100ppm)

2) Determine the week of growth or flower you are in. Note this on your feed chart.

3) Add the amount of "A" base nutrient suggested by the feeding chart. Ensure proper circulation and note the color made by the iron in the "A" is evenly distributed throughout the reservoir.

4) Add the amount of "B" base nutrient suggested by the feeding chart. Ensure proper circulation.

5) Adjust pH of the nutrient solution. For hydroponics applications, a range of 5.5 to 6.2 is suggested, with 5.8 being optimal. For Soil applications, a range of 6.5 to 7.0 is suggested, with 6.8 being optimal.

6) Add the recommended amount of the additives as suggested by the feed chart, one at a time.

Your nutrient water is ready.

Notes:

• Top Booster's line in the feed chart may be confusing. If your plants take 8 weeks to flower, you would add Top Booster only once to your nutrient reservoir in the 5th week about 2 or 3 days into the week.
• Never use Top Booster and Shooting Powder at the same time. They will lock up the nutrients and they will not get into your plants.
• Shooting Powder is added in the last three weeks. On the third from the last week, add one sachet per 25 gallons. On the last two weeks before harvest, add two sachets per 25 gallons.
  

Here's the trick: Fill a one gallon container (like an old bottled water or cleaned out milk jug) 2/3 full with luke-warm water and add one sachet of Shooting Powder to it. The Shooting Powder will fizz and bubble. Wait for the fizzing to slow, and then top off the water. Put the lid on the container and shake to ensure the Shooting Powder is fully dissolved. This gallon is now an impromptu Shooting Powder concentrate.

Now, you can add 151ml of your new Shooting Powder concentrate per gallon of feed water! It's just that easy.

The warning at the bottom of the feed chart about Shooting Powder came about due to a translation error. The next version of the feed chart will not say this. The original meaning that this was trying to convey is after using Shooting Powder, you must not re-use the medium with seedlings or young cuttings. The remaining Shooting Powder in the medium may burn plants under 10 inches tall.

To reuse the medium, either thoughtly rinse the medium or wait until the plants are over 10 inches tall to transplant.

Yes! Please feel free to add air and oxygen to your nutrient reservoir. What was printed on the feed chart is misleading and has to do with a strange translation error. Unfortunately, pallets of those feed charts were printed before this error was detected, so we have been giving them out until we run out.

The next feed chart will not contain this error. Thank you for understanding.