This site is supported by the advertisements on it, please disable your AdBlocker so we can continue to provide you with the quality content you expect.
  1. Lifetime Member Upgrade - $25 Xmas Promotion

    https://barrreport.com/threads/lifetime-member-25-xmas-only-promotion.14948/
    Dismiss Notice
  2. We are after as many aquarium plant images that we can get, doing so will assist us in completing the aquarium plant database.

    https://barrreport.com/threads/aquatic-plant-images-wanted.14374/
    Dismiss Notice
Lifetime Member - $25 - Xmas Only Promotion Aquarium Plant Images Wanted

PMDD Pre-mix questions

Discussion in 'CO2 Enrichment' started by Urglytank, Jan 16, 2009.

  1. Urglytank

    Urglytank Junior Poster

    Joined:
    Jan 16, 2009
    Messages:
    4
    Likes Received:
    0
    Local Time:
    7:56 AM
    Hi everyone, I am new to this forum.

    I have just received my PMDD premix from Aquariumfertilizer.com. I understand that buying premix one is not a better choice than buying separated chemical compounds however that 5lb PMDD premix is now sitting in front of me.

    I am trying to make the first mix but I am hesitating to do so as I am not really sure of the amount to mix.

    My questions are:

    1- Is 1/4 cup exactly 4 international teaspoons to add to 500ml H2O?
    2- Do I have to keep the solution in the fridge as per Plantex CSM+B?
    3- Does the current PMDD pre-mix contains any phosphate?

    Kindly help
     
    #1 Urglytank, Jan 16, 2009
  2. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,676
    Likes Received:
    644
    Local Time:
    7:56 AM
    I do not know what precisely pre mix is, however, old school PMDD has no PO4 added.

    You may use Fleet enemas available from local drug stores and pharmacies, these are solutions of sodium phosphate(It will say this on the label), and you might search around on the web to get something with just water, no scent etc.

    1 tablespoon is 15mls in volume.
    You can add 1 ml of 9M HCL or equivalent and not need any refrigerator.
    Do not mix the enema with the solution.

    See the Estimative Index "daily PMDD + PO4" routine for a better run down. You do not want to mix a trace mix with PO4 based things. Fine for the tank, but not at high concentrations.

    Regards,
    Tom Barr
     
    #2 Tom Barr, Jan 16, 2009
  3. Urglytank

    Urglytank Junior Poster

    Joined:
    Jan 16, 2009
    Messages:
    4
    Likes Received:
    0
    Local Time:
    7:56 AM
    Many thanks for your advice Tom. I am challenging this PMDD pre-mix for a while until I can find a better result on my part.

    Since I start dosing this a few days ago, I can see some good result as my plants start pearling however I got BBA coming along. I am having inconsistent DIY CO2 in my 40G tank. I am not sure whether PMDD also contributed to the cause.
     
    #3 Urglytank, Jan 18, 2009
  4. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,676
    Likes Received:
    644
    Local Time:
    7:56 AM
    Well, if you strongly limit say PO4/NO3, the plants will not use much CO2.
    Adding nutrients rules out those as limiting, now you have a CO2 issue:eek:

    Doh!

    This is the root problem, you need to adjust that and add some Excel till the BBA goes away. Since CO2 was non limiting at first, now it's limiting, but the nutrients are not, you need to add more.

    Otherwise, folks end thinking that nutrients, not CO2, was the issues and why they got algae(very common). But this is wrong, the CO2 was not non limiting in both cases, the nutrients caused a secondary confounding effect not present in the first example.

    You need to have non limiting nutrients and CO2, and if you want to modify growth rates, speed them up or slow them down, use light to do that.
    since that is where all plant growth starts....................;)

    Regards,
    Tom Barr
     
    #4 Tom Barr, Jan 18, 2009
  5. Urglytank

    Urglytank Junior Poster

    Joined:
    Jan 16, 2009
    Messages:
    4
    Likes Received:
    0
    Local Time:
    7:56 AM
    Appreciate your kind help Tom. Now I see your points. The only issue for me is the availability of certain stuffs in my location i.e. Flourish Excel, test kit..

    Everything so far has been done trial and error base - I even don't know my water parameters.
     
    #5 Urglytank, Jan 19, 2009
  6. Dmaaaaax

    Dmaaaaax Prolific Poster

    Joined:
    Jan 9, 2009
    Messages:
    63
    Likes Received:
    0
    Local Time:
    7:56 AM
    When making my Plantex CSM+B, I made a rookie mistake by making it up with my tap water. I got sediments the next day that I thought was just undissolved minerals. It turns out my tap has a decent amount of phosphate in it and I was getting the Iron phosphate byproduct. I was not sure how much iron I lost so I had to make a new batch in distilled/DI water this time....no sediments. ;)
     
    #6 Dmaaaaax, Jan 19, 2009
  7. Urglytank

    Urglytank Junior Poster

    Joined:
    Jan 16, 2009
    Messages:
    4
    Likes Received:
    0
    Local Time:
    7:56 AM
    I did my first PMDD Pre-mix (4 tablespoons to 500 ml distilled H2O). If I am not mistaken, 1/4 US cup is approx. 4 tablespoons. The ratio is based on the instructions from Aquariumfertilizer.com.


    Previously I used a liquid fert called White Crane Plant Plus from Aquatech. The fert is packed in a small bottle - actually it worked well for my plants however I suspect the fert is bottled from PMDD and commercially branded.


    I am battling two types of algae now - BBA and the green spot on both of my tank. People recommended me to increase PO4 to eliminate green spot and increase water circulation to stop BBA and for both cases I have to add more CO2.

    As per Tom's advice - My main issue is with CO2.
     
    #7 Urglytank, Jan 19, 2009
(You must log in or sign up to post here.)
Loading...
Similar Threads - PMDD Pre mix
  1. lazzaroni

    Just ran out of PMDD Pre-Mix. Want to try something new.

    lazzaroni, Apr 24, 2010, in forum: Aquatic Plant Fertilization
    Replies:
    11
    Views:
    142
    lazzaroni
    Apr 30, 2011
  2. anshuman

    PMDD Premix + Mono Potassium Phosphate Dosage for 46 Gallon medium planted tank

    anshuman, Mar 29, 2010, in forum: Aquatic Plant Fertilization
    Replies:
    23
    Views:
    299
    Tom Barr
    May 5, 2010
  3. misterc007

    EI pmdd style daily dosing

    misterc007, Mar 5, 2014, in forum: Aquatic Plant Fertilization
    Replies:
    4
    Views:
    189
    Tom Barr
    Mar 11, 2014
  4. shikari

    Difference between csm+b and pmdd?

    shikari, Nov 2, 2010, in forum: Aquatic Plant Fertilization
    Replies:
    1
    Views:
    98
    Tug
    Nov 2, 2010
  5. Noxtreme

    Another EI PMDD QUESTION

    Noxtreme, Feb 19, 2010, in forum: Aquatic Plant Fertilization
    Replies:
    14
    Views:
    229
    Noxtreme
    Feb 27, 2010

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice