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Easier than gel caps, adding osmocoat the existing aquariums

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  • #61
    Not Exact Just Plus In North America, From What I Can Tell.


    For whatever reasons Osmocote® Exact® and so forth are not available in North America, Osmocote Plus seems most closely to match Osmocote® Exact® Standard High K, which for North America would still be low-side K.

    I find most of this to be true for Osmocote® Plus® and Osmocote® for that matter.

    The variation I have observed is the “Temperature influences on the longevity” chart on page 16, I find the chart red “M” 3-4 to be exactly what I am seeing with Osmocote® Plus® in the water, at least for the 25-30°C range.

    What I am observing from Osmocote® Plus® in the substrate of a dozen tanks, used at the light container gardening rate, is closer to blue “M” 8-9 for 25-30°C.

    As to Osmocote® Plus® losing its humph after a few months, I have the Osmocote® Plus® I purchased a little over 3-months ago for this investigation sitting here on my desk. I have opened it several times and hand tightened the cap each time, the temperature in here has pretty much been between 23.9°C and 28°C. They look all right, a bit of dust settled in the bottom. I will test some. If they leaked, I assume I will find a heavy concentration in the bottom.

    The first sign we don't know what we are doing is an obsession with numbers. - Johann Wolfgang von Goethe

    Disclaimer: I am not trying to make you mad, it is just what I am, an evil plant monster, 'nuf said.
    • I believe the information I am giving is sound, I am not a veterinarian, professional chemist or particularly bright and certainly not a "Guru.".
    • I assume you are of legal age, competent and it is legal for you to acquire, possess and use any materials or perform any action in your in your jurisdiction.
    • When in doubt "don't."


    • #62
      The best part of all of this, is that when you add osmocote+ to your cart on and then amazon displays ->

      Items Frequently Bought With Scotts Company Osmocote Plus Multi Purpose...

      It lists '00' size gel caps as the first two recommendations!!! Lol If I wonder if Scotts has caught on to the wave of aquarium hobbyists buying up their product

      It also displays seachem and a pair of fluval 'planting' tongs further down haha


      • #63
        Question - How often do you guys add your ice cubes to the root areas of the plants?

        Do you plant them once, twice a year, three times? I've always been paranoid about that one. I use gel capsules as the ice thing seems to be tricky to keep it down...keeps trying to escape and float. Anyway, I have a small capsule maker so it's easy. My problem is that I right now mostly do the water column....I've been doing the floor only once a year.

        Oops. I forgot to ask, about how many of the little ball thingies do you guys put in your ice cubes.


        To plant more, or not to plant more, that is the question. Grin.


        • #64
          For me personally, they last a long time, well over a year. Find an existing/old one and pop it between your fingers.
          If it has a yellow snotty looking stuff in it, its still good. When expended, it will be a hollow shell.

          Maybe some traces or other element will run out before it gets hollow, but it doesn't seem so.

          I think Tom once said (maybe in this thread) that 5 ml of capsules per ice cube. If you had one capsule every 1/2 or 1 inch that would be good.

          I don't think you can over do it, but they are a pain if they get loose.


          • #65

            Thanks for the feedback. I'll have to mark my calendar the next time I do it and make sure I always do it once a year. I hadn't thought to try and find one and dig it up. I also didn't realize they were supposed to be that close to each other. I think I may have put too little. Hmm.

            To plant more, or not to plant more, that is the question. Grin.


            • #66
              I love the ice cube idea very clever but very simple
              kisanjong - "Jason"

              Nutrient Calculator


              • #67
                This was originally a Kiwi's idea(I forgot his name), not mine, but he suggested using mud, frozen, to add new fresh soil to plants. Soil is far messier than any osmocoat etc. But it works just as well. Main thing is to add the ferts to the sediment without making a mess.

                But if you are all into dirt and soil instead of osmocoat etc, then the method works nicely for that.
                Folks also roll clay with osmocoat or use clay and dirt mixes to add below the sediment.

                So you have a few ways to do this.

                There's also a the turkey baster method.

                So 3-4 ways easily.


                • #68
                  Originally posted by Tom Barr View Post
                  In advice to someone recently:

                  Osmocoat seems like a wise idea for DIY root tab solutions that has seen some revisiting lately. Slow release, small etc, ice cubes filled with Osmocoat also would make adding it in spots very easy too.
                  This is similar to soil mud ice cubes that can be added then melt in place without making a mess trying to insert it deep into the sediment.

                  Some folks had thought to use gel caps for pills to do this, but ice cubes are even easier.

                  Tom Barr
                  Tom, that's a great idea, because for me sometimes the gelcap is hard to hold onto with my giant tweezers and poke it under the substrate. Someone had mentioned that ice cubes are too big, but you can just make a 1/4 sized cube or purchase one of those cocktail ice trays that have smaller cubes.

                  I have about 30 more gel caps left to use and I am considering dumping a few into ice trays, you know a test poke!

                  Great Idea!

                  David Meeks


                  • #69
                    The problem with ice cubes is the pellets sink, which means they will be frozen half exposed along the very bottom edge of the ice cube. If you dont get where you are going with it in hurry, especially after submersing the cube, the balls will start to fall out. Another problem, and this could just be my cheap plastic ice trays, it that the ice cubes like to crack into pieces when you pop them loose. So I wind up with broken chunks of ice with various amount of balls, instead of having one neat cube.

                    Ice cubes will get you by in a pinch, or for just a couple around a plant or two, but doing a lot of them I definitely prefer gel caps.