PLS HELP ASAP!!!! What's wrong with my nile perch :-s

  • We are currently upgrading MFK. thanks! -neo
piranhaman00 said:
I think it looks worse then it is. Keep the water clean and keep adding salt.

Make sure to let him sit with the salt in there. If you just did an 80 and added salt I would let it sit for a few days then repeat.

Should clear right up:)


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Sure! I'll do a 80% wc again in about 3 days


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I think 80% is way too much water to change once a week. Better to change 40 twice a week if that's really what you wanna do. With that much water change your fish won't get used to the bacteria in your system. I'd go as far to say you could get Ammonia spikes and whose to say that's not Ammonia burn of sorts.

Anyway, Pimafix, melafix, salt, 50% change every 2 days (not being a hypocrite, it's warranted when you're treating), and stress coat helped my cause.

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davenmandy said:
I think 80% is way too much water to change once a week. Better to change 40 twice a week if that's really what you wanna do. With that much water change your fish won't get used to the bacteria in your system. I'd go as far to say you could get Ammonia spikes and whose to say that's not Ammonia burn of sorts.

Anyway, Pimafix, melafix, salt, 50% change every 2 days (not being a hypocrite, it's warranted when you're treating), and stress coat helped my cause.

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The percent of water change has nothing to do with your beneficial bacteria and would definitely not cause an ammonia spike. Water changes that large are fine. There are many people who drain so much that only the fins are covered.

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Incorrect, you are assuming there is enough filter media to support the bio load, unfortunately most keepers do not keep adequate enough bio media and therefore the water itself has to.compensate.

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davenmandy said:
Incorrect, you are assuming there is enough filter media to support the bio load, unfortunately most keepers do not keep adequate enough bio media and therefore the water itself has to.compensate.

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What does the volume of water have to do with the amount of bacteria? There would be bb on substrate filter walls ect he would have ammonia spikes regardless if there was inadequate bacteria.. doing larger and more frequent water changes would get rid of more ammonia then cause spikes.. unless I really don't understand the nitrogen cycle. Please explain it better since I'm apparently not understanding.

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I always thought that if you did big water changes you would take the bacterias food away and you would have some die, but if you did big water changes all the time you would only have a small colony due to the small amount of ammonia left in the water after the water change so if you changed your routine in any way you would create crashes and spike. I could be VERY wrong but it's they way I have always looked at it.


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Okay. Thanks for your input! And now what I'm going to do. Put that one perch in a 10g with sponge filter and a bottle full of cycled ceramic rings. Then I'll get some pinamix, add salt and do 50% wc once every two days. Let's just hope he will recover!


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The way I understand it, if there is not enough biological media to hold bb, which turns Nitrites into nitrates before they turn into ammonia, the water is forced to compensate for it by holding some bb, which is fine and the way a lot of tanks without sumps are like. When emptying too much of that water with the bb, it throws the nitrogen cycle off. Similar concept of cycling a tank without fish by actually adding ammonia to it. The water does the job, just as the plants would if it were plant filtered. I could be wrong about this, however this was explained to me by a few different people, and a common saying with water changes is "less more frequently". Also prevents ph crashes I believe, only reason for big changes is if you have a ph crash and need to get it back up. Your fish will tolerate regular levels of nitrates, my bass and rays liked the older water much better than when I did 50% changes, they get used to it, if your filtration is top notch then you barely need to WC. I am only relaying information as it was presented to me, please explain if you see where I went wrong somewhere.

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The problem is there are multiple ways to do things. Some work for some people and not for others , but everyone has their own opinion which makes it hard to decide sometimes.


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