using agar to fertilize substrate

ordloh

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Jul 30, 2009
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hi guys, my first post here at the barr report : )
lately I've been toying with the idea of using small bits of nutrient agar as a way of delivering plant fertilizers into the substrate, ie instead of clay balls which just accumulate over the years and cloud the water whenever plants are uprooted. I've been searching all over for info on this method but so far it seems like no one has tried this yet. also been looking up relevant info on how agarose binds to ions but haven't really had the time.
might try out a small batch next week and see how it goes. I'm guessing that the agar will simply break down and decompose eventually. will test out using potassium nitrate and other inorganic nutrients. Also toying with the idea of adding excel or other organic nutrients. the main reason for wanting to try this out is because agar is cheap and might easily be as effective as expensive plant tabs which pretty much deliver the same ions to the plants.
 

Tom Barr

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Jan 23, 2005
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Osmocoat is better/cheaper/last longer than agar.
I discussed using agar some years ago.

We used it for studies in flowing systems for epiphytic algae.
I think for aquariums, osmocoat is likely better.

Won't hurt I think though

Regards,
Tom Barr
 

ordloh

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Jul 30, 2009
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thanks i'll check it out : )
quite likely to try out the agar first though since its cheap as chips here in asia. I don't think i can get osmocoat easily cuz i don't think i've ever seen the product being sold here.