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Water types: Soft vs. hard & "soft water "plant

Discussion in 'Advanced Strategies and Fertilization' started by DavidR, May 9, 2005.

  1. DavidR

    DavidR Prolific Poster

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    I've been growing plants for some time with great results, but I've had trouble with a few. These plants have been labeled as "soft water" plants that grow best in "low conductivity" waters. Some examples are Blyxa japonica, Rotalla macranda, etc. I've had trouble with both of these plants, while others grow well.

    My question is more specific than general, as I know the vast majority of plants grow very well in a wide range of water hardness. I'd like to focus more on these plants, and others like Tonina, L. Pantanal, etc., as they have been deemed to grow best in "soft" water. I've moderately hard water (KH 12, GH 18), and I've love to grow some other plants.

    Do these few plants really need "soft" water? My latest ongoing experiment of about 9 months is with R. macranda. I am barely sustaining this plant. I'm down to 1 stem with a side shoot, and it looks nothing like it should; it's spindly as can be, but it is blood red. I know my nutrients are good since all my other plants are doing exceptionally well (that's the EI for ya!), and my lighting is adequate (3.4 wpg PC). I tried blyxa as well, but it just looked miserable even though it did grow a little. I really like some others, but I'm afraid to try them.

    What's the deal with these certain plants? I want to grow them; what does it take? Is water hardness to blame? :confused:
     
    #1 DavidR, May 9, 2005
  2. baruch mor

    baruch mor Prolific Poster

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    Re: Water types: Soft vs. hard & "soft water "plant

    toninas n l pantanal grow best in soft water and acidic substrate such as aquasoil - couldnt grow them in another setups...
    r. macrandra n blixa japonica are growing well even in hard water if u give then enough light and co2 and good amounts of ferts.
     
    #2 baruch mor, May 10, 2005
  3. Paul

    Paul Guru Class Expert

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    Re: Water types: Soft vs. hard & "soft water "plant

    Cabomba doesnt like hard water I dont think - mine literally fell apart :mad:
     
    #3 Paul, May 11, 2005
  4. Tom Barr

    Tom Barr Founder
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    Re: Water types: Soft vs. hard & "soft water "plant

    I've done well with all of these in harder water, R macrandra will certainl;y do better in softer water, perhas a couple of others, but most don't care.

    If Tonia has to have ADA aqua soil etc, why does mine grow 2-3 inches every week(both species) in moderate tap (KH3 GH 5) and Onyx sand?
    Unlike doing better like the Rotala, it does well in both cases.

    Regards,
    Tom Barr
     
    #4 Tom Barr, May 11, 2005
  5. baruch mor

    baruch mor Prolific Poster

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    Re: Water types: Soft vs. hard & "soft water "plant

    dont know what to tell u tom, but certainly there are a few water parameters that we can never test - maybe they r the answer. i have more then 6 planted tanks - all of them with plants that considered difficult n very difficult - sometime when a plant dont look good i transfer it to another tank and it starts to bloom , and vice versa...
    from my experience - toninas, r. wallichi, eriocaulons, r. fussila and a few more plants dont look good in hard water
     
    #5 baruch mor, May 16, 2005
  6. andrewmcleod

    andrewmcleod Junior Poster

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    Re: Water types: Soft vs. hard & "soft water "plant

    I very much doubt there is anything Tom can't get tested - not even true KH, which probably no hobbyist has ever measured ;) (since all kits measure alkalinity)...
     
    #6 andrewmcleod, May 16, 2005
  7. baruch mor

    baruch mor Prolific Poster

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    Re: Water types: Soft vs. hard & "soft water "plant

    its not that, what i mean is that even if yo place two simmilar setups with the same light, substrate, plants and plants arrengment , ferts etc. u can c usualy different growth, different colors etc.
     
    #7 baruch mor, May 16, 2005
  8. andrewmcleod

    andrewmcleod Junior Poster

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    Re: Water types: Soft vs. hard & "soft water "plant

    True - but only to a limited extent.
    And that is not true of anything general - in other words, whether or not a plant will grow in hard water - either any given plants will (on average) grow better in hard water or not.
     
    #8 andrewmcleod, May 16, 2005
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