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    My Goldfish Is A Murderer!!

    Thank you all for your replies. Yes I totally know that goldfish will eat smaller fish. I was just surprised at how it cut that danio in half in one bite. The use of the words 'murderer' and 'brutal' were for dramatic effect. I know big fish eat small fish all the time. Have any of you witnessed...
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    My Goldfish Is A Murderer!!

    Hi. I thought I'd share this experience for the benefit of any new fish hobbyists who are considering keeping goldfish with other fish. I set up a tank (approximately 200 liters including tank, canisters and sump). I have had several kinds of fish in this tank from the beginning (including a...
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    Need Help Interpreting Stubborn Nitrates!

    Thank you all for your replies. Wintemute, I think your theory is valid. It is possible that 15 or 20 or 25 or 30 or 35 ppm all look the same on the test. Momgoose56, just to make sure I understood you correctly. So you are suggesting I just abandon all the methods I have implemented to lower...
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    Need Help Interpreting Stubborn Nitrates!

    Double Dutch, now I am thinking exactly that. I should have saved myself the numerous hours of effort researching and implementing all these methods to decrease nitrates, which all failed miserably. Not to mention ripping off part of the top of my tank cover to put pothos in.... There is a...
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    Need Help Interpreting Stubborn Nitrates!

    Thank you for your reply. My tank is moderately (maybe a touch towards heavily stocked). But the thing is, this has always been my stock. And I had 25 ppm nitrates, then I added plants (several pothos and probably something like 20 lucky bamboo shoots and a lot of hornwarts) and I added two...
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    Need Help Interpreting Stubborn Nitrates!

    Hi. I have a freshwater tank which is (including tank and canisters) has 150 liters of water. My tank cycled and is still cycled. Nitrates were 25 ppm while cycling (one time went up to 50 ppm) then came down after water changes and have been 25 ppm for the past two months. Throughout this...
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    Beneficial Bacteria And Filter Media

    Thank you all for your replies. Lajos, when you say 'falling apart' what exactly is meant? In my readings I have come across this term several times (talking about filter floss). But how exactly does filter floss fall apart? It is not a single item... it is just a bunch of synthetic fibers...
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    Beneficial Bacteria And Filter Media

    Hi. I have a cycled freshwater tank (set up a few months ago). It is moderately stocked. Total water volume approximately 150 liters (tank + sump + canisters). Tank has plastic plants and gravel (more like pebbles). Sump has pothos and lucky bamboo with roots in water. Sump also has a good...
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    Denitrification Media

    Hi. Thank you for your replies. I really don't see how the exact number/kind of fish I have would be in any way relevant to my original question. I specifically asked a general question that applies to any freshwater tank: Question summarized as follows: do denitrifying media (siporax...
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    Denitrification Media

    Thank you. I have a 120 liter tank. Moderately stocked.
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    Denitrification Media

    Hi, everyone. I have read a lot about various medias that can perform denitrification (seachem matrix, seachem denitrate, Sera siporax....etc) due to the outside of the media being aerobic and depleting the inner part of oxygen and therefore anaerobic bacteria can colonize the deep parts of the...
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    Cleaning Substrate

    Hi. I have read a lot about various issues with maintaining an aquarium. On the topic of substrate vacuuming, many say you should do it, but others say it is not neccessary (in a mature tank with no overfeeding). One concern is disrupting the beneficial bacteria. The advice is to do small...
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    Constant Vs Variable Tank Conditions

    Thank you, all for your replies. The reason I asked this question is the following: I have recently set up a tank and stocked it. It is cycled. I was aiming to have a beautiful, QUIET, aquarium with fish swimming gracefully (not fighting currents). I have spent hours and hours tweaking the...
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    Constant Vs Variable Tank Conditions

    Hi. I am relatively new to this hobby. I have a few questions. I totally understand that any type of fish needs stable and appropriate water parameters (temp, ph, cycled tank, etc... ). My question here is, can variability of other factors such as flow/current, noise, air pump running/not...
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    Bacterial Additives For Cycling

    Thank you for your replies. Unfortunately I already have the fish so a fishless cycle is not an option now. I would appreciate if anyone has any further opinions or input on this topic. However, just let me make sure I understood correctly: so you are saying adding bacteria is not neccessary...
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    Bacterial Additives For Cycling

    Hi. This is my first post. I am new to fish keeping. I have done a lot of reading about cycling a freshwater tank. But there is one thing that is not clear to me. During cycling a new aquarium (with fish in tank), where does the bacteria come from (to start the bacterial colonies multiplying)...




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