Cannot get nitrites down

Discussion in 'Aquarium Nitrogen Cycle' started by swoozypoo, Feb 26, 2006.

  1. swoozypooNew MemberMember

    For the last week or so I have had high nitrites and I cannot seem, to get them down. It is a 30gal tank with 4 mollies and 1 pleco. I had a mollie get a mouth fungus several weeks ago and I was advised to used Melafix. It seems ever since then the water has been wacky. Right now the readings are 7-7.2 pH, >5.0 nitrite, 0.25 ammonia, 0-5.0 nitrate. I also tested my water since I have been doing water changes. Those readings are 6.6-6.8 pH, o nitrites, 0 ammonia, and 0 nitrates. I was only doing smaller water changes until I read that larger changes are better for emergencies. So the last 2 days I have done about 40-50% changes. Along with the changes I have added awuarium salt and stress zyme. I also have a nitrozorb pouch in the filter in place of the carbon. I am at a complete loss and it just kills me to see my fish suffering.

    Thank you,
  2. EmpPlecoWell Known MemberMember

    Just keep doing large daily water changes, and you should see changes soon :)

    I would try to avoid chemicals as best that i could.

    Good Luck! :)

    P.S I hope you know that a common pleco gets up to 2 feet lonG!! He will outgrow your 30 gallon very soon (that is, assuming that what you have is a common pleco, lol -- you didn't specify;))
  3. JonWell Known MemberMember

    actually ive never heard of a common pleco getting 2 feet but they will get almost 1 1/2 feet. what type of pleco is it?
  4. EmpPlecoWell Known MemberMember

    I have definately heard and seen them get 2 feet long. quite common actually.

    Even in your case, although, 1 1/2 feet is still way to large for a 30 gallon....
  5. JonWell Known MemberMember

    yeah but its prolly not a common
  6. EmpPlecoWell Known MemberMember

    that is how big commons get. But actually, we don't really know until she tells us..
  7. rob2ukValued MemberMember

    Melafix is tea tree oil, which is an antibacterial...

    It's possible that it's killed some of the good bacteria in your tank and started a mini cycle.

    The only way to get rid of it is to keep up with the water changes
  8. swoozypooNew MemberMember

    Thank you for your responses. I will continue with the water changes and hopefully it'll decline. I checked it this morning and perhaps I am hopeful but it did look just a shade lighter in the vial. I am worried about on mollie hanging around the heater near the water source. I'm not sure about the pleco....perhaps I got the name wrong. I will double check and get back. Oh, another question....I bought algae wafers (the size of a penny) for the sucker fish to eat at night and if I don't hide it the mollies try to eat it. Is that normal and how can I prevent it.
  9. vinWell Known MemberMember

    It might be kind of tough to hide the wafers from the platys....they like a little algae now and then....I know my swordtails gobble them up!
  10. swoozypooNew MemberMember

    It is definately a pleco but not sure which kind. It is only about 2-21/2" right now. I guess I will worry about tank size later...providing I get the water situation fixed. I truly enjoy the fish tank and once I get the routine figures out to keep water optimal I would difinately consider larger and/or another tank. I was debating whether to remove some gravel to help with getting rid of whatever is causing high nitrites. Is that a good idea and if so, should I take the fish out while I do it since it'ss stir stuff up and make water cloudy.
  11. swoozypooNew MemberMember

    Sorry about all of the posts...I keep thinking of more questions!! Should I keep the light off, or at leats on for a shorter period. Also, how about additional aeration (like an air stone) for addition of O2. As you can tell, I will do anything to help these fish.
  12. ButterflyModeratorModerator Member

    Your tank sounds like it is still going through the cycle. This could account for your fishies feeling a little under the weather :) How long has it been set up?
    I would discontinue all chemicals except dechlor for now. It's really hard to tell how your tank is doing if there are other chemicals in there ;)
    Continue with the partial water changes (you fish will love you for them) and be patient. Since you are showing some Nitrates it sounds like you won't have long to wait.
    As for the pleco - at any size they are heavy waste producers and will require diligent water changes and tank maintenance.
    For lights- about 10-12 hours is fine maybe 14 if you have live plants.
    Just my two cents worth.
  13. EmpPlecoWell Known MemberMember

    I'm not sure if you are already doing this, but you can try putting the algae wafers in when the tank and the room lights are off. The other fish shouldn't be able to find it, But plecos are nocturnal and have very good night vision ;)
  14. swoozypooNew MemberMember

    The tank has been set up for about 2 months. I had a molllie with a mouth fungus and was advised to used Melafix to treat the water and ever since then (about 3wks) everything has been wacky and I havn't been able to get on track.
  15. ButterflyModeratorModerator Member

    How did you get the Melafix out after teh treatment was over?
  16. swoozypooNew MemberMember

  17. swoozypooNew MemberMember

    So....nitrites are still high....but (and this might be my imagination) the vial looked a shade lighter this am. The mollie that was hanging by the heater near the top is now head standing near the bottom or when she can is using one of the tank ornaments to help he stay still. Last night was the first she did not eat. I know this is a seroius sign for her. Is there anything esle I can do for her now? ??? The other 3 mollies, 1 mollie baby and 1 pleco all seem fine so far.
  18. RudeeRuValued MemberMember

    Hello!  I recently had the same problem, and after multiple WATER changes (don't touch gravel) and Amquel +(plus), my levels started to decrease!  The good thing about the Amquel is that it makes the nitrite levels go down and retains the "food" portion of it for the good bacteria.  I did 3 doses and 4 water changes (50% the first day, and 25% all the other days) and it helped me get over the toxic levels, tank finally cycled, and now it's still zero and I haven't had to add anymore!  The Nitrosorb will (in time) absorb the nitrites but then the bacteria have nothing to eat!  I found the Amquel + to work well and fast (I tried the pouch too, no fast results).  But I needed fast because my fish were on death's door; I had already lost one and my nitrites were well over 5! Everyone here has great advise; but I will say the best advice I had was the Amquel + suggestion. Good luck!
  19. RudeeRuValued MemberMember

    Oh, and leave the carbon filter alone. THat's another good thing I learned here; the filter has all the good bacteria, and you don't want to lose that at this stage! ;D
  20. swoozypooNew MemberMember

    thanks for your input. nitrates are still very high but is does seem that nitrates are possibly hopefully nitrites will drop soon. I've been doing the water changes (except last night) without adding anything anymore and I put the carbon back in the filter. The fish are starting to look sluggish but they still LOVE to eat!!
    It is all very depressing so I am just prayingfor the growth of those bacteria!