Ideal water condition for Marimo only tank? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 05-07-2018, 10:47 AM Thread Starter
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Ideal water condition for Marimo only tank?

Hello,

I have a tank with Marimo only and nothing else. What are the ideal water conditions (pH, GH, KH, etc) and fertilizers for fastest growth?

I am starting with RO water because my tap water varies too much. To that, I add Seachem Equilibrium and Potassium Bicarbonate until GH ~6 and KH ~6. Then I add a few drops of Nilocg Thrive+ until the nitrate level is what I want (maybe around 20 ppm or so - no particular reason). I also have LED red / blue grow lights and the ability to add CO2 if I feel like it.

Since Marimo are slow growing, it is hard to tell if anything is "working", but I think there are two problems. One is that the Seachem Equilibrium leaves a layer of brown precipitate on the bottom which is unsightly. I would rather have something else to increase GH. Second, my Marimo doesn't seem to photosynthesize as much as other pictures I have seen on the internet, where they are totally covered by bubbles
(of O2). Even when illuminated by the grow light, mine only develops a few bubbles on the bottom, but at least it does float up. I wonder if something is holding it back, or maybe I just have a special breed of inert Marimo...
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post #2 of 5 (permalink) Old 05-07-2018, 01:55 PM
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Ideal water condition for Marimo only tank?

Generally you won't see pearling without CO2 but it can happen in certain conditions.


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post #3 of 5 (permalink) Old 05-07-2018, 04:37 PM
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I have a collection of merinos I neglect in jars sitting in a dark corner for years. I only refresh the water once every couple months. they look the same as before. they are very low maintenance.

The merino I put in my tank grows a lot better with brighter colors.
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post #4 of 5 (permalink) Old 05-08-2018, 07:44 PM Thread Starter
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Originally Posted by IntotheWRX View Post
The merino I put in my tank grows a lot better with brighter colors.
Must be something in the water...
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post #5 of 5 (permalink) Old 05-14-2018, 05:52 AM
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It's an algae. Give it sunlight and nutrient rich water, and you'll be fine.
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