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Pumice Stone and Ferts

Discussion in 'Advanced Strategies and Fertilization' started by SingAlongWithTsing, Jul 26, 2017.

  1. SingAlongWithTsing

    SingAlongWithTsing Junior Poster

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    so my current set up is a 135 gal with a 55 gal sump. pumice stone being the main bio media in the sump (for the past 3 months?).

    i'm wondering if this could potentially have any negative effects on my plants since the pumice is in the sump where the roots obviously cant reach? something along the lines of ferts being stored into the pumice before a majority of it is consumed by the plants. most of my plants are doing alright but i'm wondering if i'm dumping more ferts than i need to cuz of the pumice.

    guess my 2nd question if it's possible for w/e nutrients stored in the pumice to give high nutrients readings, e.g. nitrates being 80+ ppm, 5+ ppm phosphate.

    this is my current dosing regime:
    [​IMG]

    it never really came a cross my mind til i saw this bonsai article comparing different substrates:

    http://www.colinlewisbonsai.com/Reading/soils2.html
     
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