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Thread: Adding Prime

  1. Default Adding Prime

    0 Not allowed!
    Just a quick question on what everyone has found to be the best procedure for adding Prime. I currently use buckets and a siphon hose to do my water changes, so I have been trying to add a very small amount of prime to each 5 gallon load of water I fill up. I know some of you are using python's and the like, and so must be adding Prime directly to the tank. I am thinking it might be easier for me to do the same prior to adding my multiple buckets, but worry over destroying the bb I have built up prompted me to just clarify what works best for everyone.

    So using my 20G as a reference, I would do my regular tank clean, gravel vacuum and water siphon. Then prior to adding water back, add a dose of prime for the whole 20G amount regardless of how much water I actually drained or will replace, then cart my water buckets over and add them. Then how long should I wait before turning my filter back on to be sure the prime has done its job?

  2. #2

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    0 Not allowed!
    Many of us, including myself, do add the Prime directly to the tank however, it actually is better to add the Prime to each bucket of water. This way there is no chlorine or chloramine in your tank.
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  3. Default

    0 Not allowed!
    I don't mind adding it to each bucket, though dosing at that small of a level has been... well a guess, though I am erring on the side of caution and filling the cap to the first thread line. a gallon bucket should be .5ml right?

    I am guessing a little too much prime will do no harm other then empty the bottle quicker, so I add the prime to the empty bucket (since the threads dont start right away I think I am likely adding a little more then 1ml to each bucket), fill it up and then go slowly pour it in.

  4. #4


    0 Not allowed!
    For my 10 gallon, I need 1 ml of Prime per tank..and I use a medicine syringe filled to the 1 ml mark...When I do a WC, using the Python, I slowly squeeze out the Prime from the syringe into the stream of tap water coming from the Python

    If you can get one of those medicine syringes from your local pharmacy (I think they'll give you one free if you ask) it would help, I think that they all come in ml measurements but not positive
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  5. Default

    0 Not allowed!
    turn off your filter if you are worried about the bacteria.

    add prime to aquarium

    put new water into aquarium (stir if you want, prime is an instant reaction) using buckets

  6. Default

    0 Not allowed!
    I turn the filter off first as the water level will drop below the minimum level for correct operation, also the power head.

    Remove the water, I actually attached your typical gravel vacuum to a garden hose using adapters I bought from Home Depot (I don't use this garden hose for anything else but the tank). The thought of wasting several gallons of water for every gallon or so you remove with a Python or something similar was just stupid (especially for the size tank I had), and I did not want to do the whole bucket thing either.

    Then I connect the hose back and start returning water to tank. I immediately add water conditioner (not currently using prime - but it works) and just a little more than required according to instructions. Once the water level meets the minimum for the power head I turn it back on to help circulate the water. Once the tank water level is back to where I like it I then put away all my equipment and conditioner, wipe the glass down where water splashed etc, about 20 minutes or so. Then I turn the filter back on.

    I have not had any issues. Test the water about an hour later. I'm big on working smarter not harder.
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  7. #7

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    0 Not allowed!
    I add prime directly to my tank at its low point when im using sponges. Otherwise I add it directly to a hob and let the water flow through there.

  8. #8

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    0 Not allowed!
    I too use buckets for my freshwater tanks waterchanges, even though since last November my son has been doing them since I changed to saltwater.
    I would turn off the canister and HOB, vacuum the gravel taking water out of the tank, have my water buckets at the same temp. as the tank, add a cap-full of PRIME to each bucket (even though a cap full of Prime would condition the whole tank), stir the bucket for several seconds, and add the bucket to the tank. Once the water level was back up, I would start the filters up again.
    Warning; Bulldog Pleco guarding my Sons tank now..

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  9. #9


    0 Not allowed!
    * Turn off filters
    * Drain 40% of the tank
    * Add enough prime for total volume of tank [For me: 1 or two capfuls depending on the tank]
    * Refill with appropriate temp water from python.
    * Restart filters

    ... Lather, Rinse, & Repeat on all tanks until WCs are done.
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  10. #10


    0 Not allowed!
    Before adding water, just add a full dose of prime and then add the water.

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