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I normally don't order lots of root tabs. I should; I have tons of plants that can use them. But they are more buoyant than anything I've ever seen in a aquarium, and it's really difficult to get them deep under the root of my plants (even with forceps) so that they'll stay there before the tablet casing begins to degrade! It sometimes takes me several minutes to deposit one tablet, and it's a task I really don't look forward to. When folks on this forum a couple weeks ago mentioned a very expensive, unavailable-to-the-US mechanism made just for this purpose, I hit the internets. But there was no way I could have something like this shipped to the US for less than $60! So I started researching the DIY route, and after some trial and error and lots of research, I've come up with this one-handed solution. It can be made for less than $10 in parts from your local Home Depot. In fact, you can make two for about the same cost! It is sized for Aquarium Co-Op Easy Root Tabs. PARTS: So let's dive in. These are the parts I collected together (non-affiliate links) : 1. Straight PEX Pipe: 1/4" ID, 5' length: $1.76 https://www.homedepot.com/p/Apollo-1-4-in-x-5-ft-White-PEX-Pipe-APPW514/301541226 2. Wood dowel: 3/16" diameter, 4' length: $0.70 https://www.homedepot.com/p/3-16-in-x-48-in-Wood-Round-Dowel-HDDH31648/204354369 3. Drawer pull: 1-1/14" birch cabinet knob: $0.98 https://www.homedepot.com/p/Liberty-Rowland-1-1-4-in-32-mm-Birch-Wood-Round-Cabinet-Knob-P10512H-BIR-C/204143998 4. Drawer pull: 1-13/16" birch cabinet knob: $1.88 https://www.homedepot.com/p/Liberty-Classic-1-13-16-in-46-mm-Unfinished-Birch-Wood-Round-Cabinet-Knob-P10515C-BIR-C5/100156480 5. Springs: 6-pack zinc-plated compression springs (used the 3/8" x 1-1/8" x 0.041" spring): $4.22 https://www.homedepot.com/p/Everbilt-Zinc-Plated-Compression-Spring-6-Pack-16087/202045468 TOTAL: $9.54 TOOLS: 1. Drill and assorted bits 2. Wood glue (or white glue) 3. 5-minute epoxy PREP: The 1/4" PEX pipe does not fit the Easy Root tabs. I made it fit by enlarging the first inch or so of one end of the pipe using a 5/16" drill bit. Now, the smaller end of the Easy Root Tab fits very snugly. If I don't push it in too far, it's a perfect grip! Next, I cut a 12" length of the PEX pipe and a 13" length of the dowel. I don't have very deep tanks, so this is fine for me. But this can be cut to any length you need; just make sure the dowel is always one inch longer than the tube. The wooden knobs already have holes drilled in them, which made it very easy to enlarge them to exactly the diameters I needed. For the smaller knob, I enlarged the hole to 3/16", making sure not to drill all the way through. I glued in my wood dowel with a drop of wood glue to hold it permanently: For the larger knob, I enlarged the hole to 3/8" diameter, this time going all the way through. I made sure to start with a 3/16" bit, and repeatedly went larger and larger until I reached 3/8". This ensured my hole stayed centered and I had a nice clean cut all the way through. I glued in the length of PEX pipe with 5-minute epoxy. This should hold well enough for my purposes. I'm using the shorter, wider spring for this project (3/8" x 1-1/8" x 0.41"). For good measure, I used some 5-minute epoxy to glue the spring to my plunger. This is totally optional, but gives me one less piece I can lose. That's pretty much all there is to do. I just inserted the plunger in the tube and I'm ready to try it out! I placed an Easy Root Tab in the end, just far enough for it to grip, but not so far that it won't push out easily. I inserted the tool with one hand into the tank, pushed the plunger, and voila! A deposited tablet in 5 seconds! But I am over the moon about how this tool turned out. I just placed about 20 tabs in two minutes. Even with coarse gravel, forcing the pill in was no problem. The two pieces come apart for drying, as that wood dowel won't last forever. Now I understand why the professional ones are so expensive. This makes things so much easier. I'm definitely making a longer one for deeper tanks. Hope you find this useful. Thanks for reading! Bill