I found this in another portion of the forums (Click Here) and decided it was right for me. I have really appreciated the help I've received from this community so I decided to give something back and document my DIY build. In total I used 1/5 of a pound of the Soil most polymer and about 3 ounces of the O.N.A concentrate. This stuff goes a long way! From what I've read this will last me over a month. I will come back and update this guide a month from now. I have also just put my plants into flowering! PRICES ONA Concentrate (32oz) - $16.95 Soil Moist Polymer (1 lb) - $12.95 Honeywell Fan - $15.99 Bucket (Unknown volume/medium) - $1.00 Roll of Duct Tape (God bless duct tape!) - $1.00 =47.89 TAX: 4.66 TOTAL PRICE: 52.55 As you can see this is fairly inexpensive and VERY effective. It will neutralize all odors and mask anything it might somehow have missed. I have not tried it in flowering so I will update this when that has happened. THINGS YOU WILL NEED - First thing you need is a circular tabeltop fan of some kind with the motor built into the fan assembly. Having the fan built into the housing assembly will allow you to remove the base of the fan for easier mounting onto the bucket. I bought a Honeywell 6'' tabletop fan for $15.99 from Target. The Target.com website allows you to locate a store near you that has them in stock. - Now head over to your local hydro shop and pick up some O.N.A concentrate and some soil most (or generic equivelant which is most likely called Polymer Wetting Agent). DON'T buy the O.N.A gel! You will be making your own. You need the O.N.A Concentrate that is used to renew the gel in the O.N.A gel bucket. - You'll need to get a bucket and a roll of duct tape, as well as some cardboard. Cardboard is plentiful and free. I went to the 99Â¢ store and got a bucket that was a bit small for my liking but the price was right. You should look for a 5 gallon bucket. I could not find a lid for my bucket so I made one out of cardboard. I included it in this DIY.You can also find duct tape at the 99Â¢ store. Maybe even Soil Moist. -You'll need a few tools. I recommend a box cutter, scissors, phillips head screwdriver, and a drill. ---------------------------------- STEP 1: Gather your stuff! STEP 2: Remove the base of the fan. A. Remove the plastic caps covering the screws that secure the base into the main fan body. B: Unscrew the base from the main fan body. STEP 3: Measure the circumference of the fan on the cardboard, so you can easily make a lid. If you have a lid you may need to cuy away a portion of the lid to fit the fan body into. If you're making your lid out of cardboard like I did then cut at an inward angle toward the inside of the fan assemble to create a secure hole for the fan. Remember we'll be folding the cardboard over to double it up so cut accordingly! STEP 4: Cut away any excess from the cardboard. You may consider putting cardboard between the folded-over cardboard to reinforce it. Next completely duct tape the entire thing. Mummify it! Go nuts! Make sure the cardboard is sealed away from the moisture in the bucket. The finished product can also double as a DIY - hemmorhoid pillow. STEP 5: Line up the fan with the hole in your lid. Tape the lid onto the front of the fan as shown below. The fan will be blowing INTO the bucket! You can have it blowing out if you like. I tried it both ways and I like it sucking the air into the bucket. STEP 6: Time to drill holes into the bucket! My bucket was a medium sized bucket, but you generally want the holes on the top 1/3 of the bucket. No more then half way up. Make the holes between 1/4 and 3/4 inches thick. The smaller you make them, the more you'll need. The Soil Moist Polymer will expand to 50 times its own size. I recommend marking off a section of your bucket and drilling a bunch of random holes. I lost count of my holes after 40-something. STEP 7: Now it's time to mix our solution and make our gel! Depending on how much you want to make and how strong you want this to be, you will need to adjust the recipe accordingly. I started with a small amount and worked my way up to a good level. Start with 5 cups of water (1 cup=8oz) and a quarter cup of O.N.A Concentrate. A quarter of a cup might be too much as it is. It's REALLY strong. After you mix the water/O.N.A solution, mix in the polymer. Half a cup should be good enough. Like I said start with a small amount and add more as you go. - If you make it too strong, wait a few hours and it should die down as the Soil Moist absorbs it. If it's still too strong mix 1 cup of water & 1 tsp Soil Moist until it's weak enough for you. You can also add just water if you like. -Soil Moist has NO SMELL and resembles a clear gel when expanded. In the dry state it's the size and texture of a grain of rice. After about an hour it should look like this: STEP 8: Last step! Put the fan lid on top of the bucket with the O.N.A gel you just made and turn it on! Listen to the fan on and off of the bucket. Does it sound like it's struggling a lot? You might need to drill more holes! Don't worry about a small amount of difference. The bucket itself will buffet the sound and not to mention the purpose of the bucket is to force the air against the surface area of the gel you just made. Stick it in a corner, grow room, closet, etc... and enjoy!