Review on 12 Count Greenpro Root Tabs Fertilizer Tablets: Ideal For Aquariums, Ponds & Water Gardens! by Matt Schmick

Update Mar 21, 2019: So I have been using these tablets for six months now. I noticed an immediate improvement with the health of my plants. Valisinarias are now out of control, and my swords and crypts are nice and full. I have used these tabs in tanks with amano shrimp and ghost shrimp, as well as several species of snail, with no issue. This stuff does work! I am a happy customer.I haven’t noticed any ammonia or giant nitrate spikes like other reviewers have mentioned. I also dose the water column with an all in one N-P-K fertilizer in addition to using these tabs, yet haven’t noticed my fish having any difficulties or my parameters jumping out of wack. However, it bears noting that my tanks are heavily planted both above and below the waterline (riparian type setup) and my tanks are medium light, non-CO2 injected.These are huge tablets. I do agree that the dosage suggested in the package seems a little confusing and if I had followed it, would probably be way too much for an aquarium. I cut them into 4ths, since that was about the size of my other tabs, and then use them sparingly just under the plants that need it most. The substrate is about 3 inches deep and I bury the tabs all the way down to the bottom. The 29 gallon tank has only ever gotten about 1 1/4 tablets at the maximum, and gets even less that that on a normal basis. My 5g has only ever gotten 1/4 a tablet, and my 10 gallon wavers between 1/4 and 1/2 a tab. Again, I just use them under the plants that look like they are struggling. I am not sure if any of the above is the reason I have better success, but I thought it would be worth mentioning.My results are anecdotal and relevant to my situation, so take it with a grain of salt. Planted tanks are a fine balance between light, the bioload from the fish stocking, nutrients available, and plant nutrient uptake. No two tanks are the same, so what works for me may not work for another. You may find you need less, or more. All we can do is test and adjust until we find the balance that is right for that particular aquarium. :)I will be buying these tablets again.(original review Sept 7, 2018: The content of these tabs look better than the brand I was using. I have high hopes. My swords, vals, and crypts should appreciate these rather large tablets.Note: As of this review I haven’t used them yet, so I am only able to rate shipping, packaging, and value. All of these things were excellent, hence the five star rating. I will update my rating once I have sufficient time to test their efficacy.)