Cannot rid of ammonia.

Discussion in 'Water Chemistry' started by johηski, 13 Sep 2008.

  1. johηski

    johηski Member

    Messages:
    29
    Location:
    UK
    Hi, i have a 20g tank that has been running for about 8 months now, and i recently planted and got new lights and co2

    Since doing so, i have lost a large amount of fish due to ammonia in my water! i have no idea what is causing it.
    I have also started getting what looks like algae on the bottoms of the plants stems (hairy white stuff)

    I am now left with 4 neon tetra.

    20g tank
    fluval 305
    pressurized co2 (30ppm)
    5ml TPN+ daily
    4 neon tetra
     
  2. Ed Seeley

    Ed Seeley Member

    Messages:
    3,262
    Location:
    Nottingham
    What substrate have you got and what water changes are you doing? How much are you feeding? Have you recently replaced the filter?

    Basically stop dosing TPN+ (it does contain tiny amounts of ammonia that the plants will usually use in no time at all I believe), stop feeding and do 50% daily water changes until the ammonia stops registering. Once you have the ammonia down to zero then reduce the water changes to every other day, then if that's ok after a week then every three or four days and so on until you're back down to weekly 50% water changes. If you haven't replaced the filter then it seems that somehow it hasn't cycled correctly or has 'crashed' and you need to treat this tank as a new tank for a while.
     
  3. johηski

    johηski Member

    Messages:
    29
    Location:
    UK
    Its just normal playsand.

    Ive been doing waterchanges daily for about 3 weeks, around 50%.
    If i stop dosing TPN+ wont by plants start to get defficencies (sp)

    also i havent been feeding hardly at all, well ive dropped 3 flakes in once a week or so.
     
  4. Matt Holbrook-Bull

    Matt Holbrook-Bull Founder

    Messages:
    963
    Location:
    Dorset, UK
    are you sure its NH4 killing your fish?

    do you use a drop checker to check your co2? it seems incredibly odd that youd have and NH4 problem that far in... maybe we need to look elsewhere for the cause
     
  5. lil-lynx

    lil-lynx Member

    Messages:
    499
    Location:
    Staines
    hello I have a 5ft aquarium and just bought a new fx5 with a vecton 600. I woke up this morning to find all my fish floating . The aquarium all ready had a fully mature fx5. I have just done a water change what else can I do ?. Also how many water changes should I do in a day as I don't want to stress my silver shark out as they get very stressful very easy
     

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