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  1. #1
    Tiny Fry
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    Aug 2004
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    Sydney
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    Discus Gravel / PH Level

    I wanted to get black gravel. i love the look of it with green plants and brown wood. However, I have been told the ph level is 7.2 which is to high for discus.

    Is that true, or where do you get low ph black gravel?

    Thanks

  2. #2
    Eternal Moderator Merrilyn's Avatar
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    Jul 2004
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    Black gravel looks wonderful with the rich green of plants, but the aquarium gravel available will give you ph problems. There is an artificially coloured gravel available sold in small bags - totally inert - colour does not fade however VERY expensive to do a big tank. If you want to go that way I will find out the name for you. I have used this and it does not alter ph or hardness. Just a point to remember, all your discus will darken slightly to match the substrate. Any peppering will be more visible.
    Thirty-five years keeping and breeding discus, and I'm still learning :P

    Merrilyn has passed, but will not be forgotten - Goodbye dear friend

  3. #3
    Tiny Fry
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    Thanks, please can you find out the product name.

    What is the ideal PH level. There are som many conflicting reports

  4. #4
    Eternal Moderator Merrilyn's Avatar
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    Confusing isn't it. Everyone has their own ideas about ph and the truth of the matter is that there is no exact answer. In an ideal world you would keep water for breeding pairs at around 6.5. There can be a wide variation in that, anything from 5.5 to 6.8. For growing fry I keep the water at 7.2 and toss a handful of shellgrit into the filter to increase hardness. Growing bones need extra calcium and minerals. For general maintenance, just whatever comes out of the tap with out alteration is best. You will be doing big water changes so try to keep it simple. After 24 hours ageing my water is 7.1 so thats what the fish get. And yes, I'll get the name of that gravel for you.
    Thirty-five years keeping and breeding discus, and I'm still learning :P

    Merrilyn has passed, but will not be forgotten - Goodbye dear friend

  5. #5
    Tiny Fry
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    Aug 2004
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    Thanks, what is the best tool for measuring PH. I use the sera ph kit where you compare the water colour to that chart they give you. I can only tell the ph range not a specific number. What should I be using if I want to monitor my ph and breed discuss, or at least attempt to.

    Thanks

  6. #6
    Moderator kalebjarrod's Avatar
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    Tamborine, Farm Boy
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    Discus have been know to breed in varied pH levels the main point all these breeders made was water quailty

    water quailty is the key so invest in a drum and pump so water changes are easier.
    RYAN --- DIY ROCKS!

  7. #7
    A simple test for gravel to check if it has an alkaline reaction is to pour a few drops of a strong acid like hydrocloric on it. If it bubbles and froths then the gravel will raise your ph and is unsuitable for a discus tank.

  8. #8
    Moderator
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    Feb 2004
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    Doesnt vingar have the same effect?? With substrate that it

  9. #9
    Yes vinegar does have the same reaction but it is not as immediate or obvious. If you prefer to use vinegar then put some gravel in a cup of vinegar and you will see bubbles within 24 hours if it is reactive.

    Cheers

    Rod

  10. #10
    Moderator
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    Mate if i stare at a cup of gravel for 24hours the mrs will send me too the nut house.

    Might have too try a stronger acid.

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