hygrophila polysperma leaves curling

Discussion in 'Plant Help' started by Aqua Hero, 12 May 2015.

  1. Aqua Hero

    Aqua Hero Member

    Messages:
    241
    hi i have hygrophilia growing in two tanks. the hygro in my 30 gallon is the one that has the curling leaves. the leaves at the bottom are straight and green same for the hygrophilia in the shade of the guggy grass. the leaves that are closer to the light seem to be affected.

    for a few months i have kept things constant.

    lights: dual t5HO (10000k and plant growth). they are set on a timer for 10 hrs
    C02: 3 ml of excel every day
    filter flow has been the same
    water changes every 2 weeks (it has no fish)
    temp: 82F in the day, 81F at night

    the only thing that has changed really is that for two weeks now i havent been dosing my esha plant food because it ran out. but the hygro in the 8 gallon tank is in the same conditions except it lives in low light leds. i dont dose ferts anymore because it ran out but the hygro in there is doing fine.

    could it be the lack of ferts or the high light?
     
  2. Sk3lly

    Sk3lly Member

    Messages:
    346
    Location:
    Windsor, England
    High light, high duration, low excel dose, no ferts is a recipe for poor plant health and algae problems


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  3. Aqua Hero

    Aqua Hero Member

    Messages:
    241
    3 ml dosage of excel is the max i can do or i will be overdosing it. my plants seem to pearl alot after every water change even the weird leaves on the hygro look like they have crystals on them. the light isnt causing me any algae issues. i have no algae on the glass. the only algae i have is detritus but that isnt an issue cause my plants are still growing fine. the brown algae has stopped growing but im keeping it there for the shrimp or otocinclus to eat when i get them.

    im not quite sure what you mean by "high duration" but i know not having ferts is a bad thing.
     
  4. Sk3lly

    Sk3lly Member

    Messages:
    346
    Location:
    Windsor, England
    If you read the back of the excel bottle it says to up the dosage for a high light tank. I dose 10ml daily in my 60litre tank. I also inject co2. So my excel dosage is like 200% higher than yours.

    High duration i mean the 10hour light schedule. Seems a lot to me

    You have posted saying your plant is showing this problem. Therefore this plant is NOT healthy. This WILL open the door for algae


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  5. ian_m

    ian_m Global Moderator Staff Member

    Messages:
    4,934
    Location:
    Eastleigh
    You don't know the meaning of liquid carbon overdose....stop under fertilising get on with it....

    This is overdosing liquid carbon with b*gger all effect....
    Pump timer issue and liquid carbon overdose....
     
  6. Jose

    Jose Member

    Messages:
    1,371
    Location:
    Salisbury
    This is really one and the same. If you have more light your plants will normally need more nutrients. All you need to do if you think its a deficiency is to just dose more.
     
  7. Aqua Hero

    Aqua Hero Member

    Messages:
    241
    wow okay lol. i will increase it to 12 ml and see what happens
     
  8. Jake101

    Jake101 Member

    Messages:
    118
    Location:
    Solna, Sweden
    I tested polysperma with my students using different primary macro deficiencies and the lack of potassium caused curling leaves. Didn't test secondary macros or micros, so the reason can naturally be somewhere there or with the lights/co2 levels. But that is just guessing.
     
  9. Aqua Hero

    Aqua Hero Member

    Messages:
    241
    okay where your coming from. but then can you explain to me why the leaves further away from the light and the other hygrophilia that are planted in shade look absolutely fine?
    could it be that the leaves at the top are dealing with a higher intensity of light therefore need more nutrients?
     
  10. Aqua Hero

    Aqua Hero Member

    Messages:
    241
    also the hygrophilia in my other tank also dont get the ferts anymore but they grow to the top of the tank with no issues. the light is considerably lower too.
     
  11. Sk3lly

    Sk3lly Member

    Messages:
    346
    Location:
    Windsor, England
    Lower light the plant requires less ferts and co2.

    This is basic plant theory.

    More light, faster growth, higher demands for co2 and ferts

    Less light, slower growth, lower demands for co2 and ferts


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    Sarpijk and Michael W like this.
  12. Aqua Hero

    Aqua Hero Member

    Messages:
    241
    alright i understand.
     
  13. sciencefiction

    sciencefiction Member

    Messages:
    3,302
    Micro nutrient deficiencies affect newer leaves, which are normally the ones near the light...
    Macros such as nitrate, potassium and phosphate affect older leaves first but a severe deficiency will make it's way to new growth with some.
    For the curling leaves, I'd go with a dose of micro nutrients. Ideally you should be dosing both if using liquid carbon.
     

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