HOW TO: Build a Goldfish bowl filter

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The point of this video is to educate people drawn into the hobby but these fish bowls, on filtration and the nitrogen cycle.

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The king of DIY


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Written by The king of DIY

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  1. This is a video that actually just shows fish abuse. Betta in gallon bowl, no room to actually breathe, strong bubble agitation, all extremely wrong actions. If you follow anything in this video you are actually abusing your fish not helping them in any way.

  2. 1:44 That is fish abuse. Betta fish need at LEAST 2.5 gallons to be able to thrive. You may be thinking it's swimming fine now but is it happy? No. Also there is no way for it to come up for air betta fish have the gift of lungs too so they need to come up for air. Plus you say debris. You are going to let that poor betta suffer in a constant dirty bowl you monster. Give up your yt career or get it a bigger tank. I recommend 5 gallon tanks. Also filtration ( not the diy filter that it's in ) and a heater is a must. Or they could develop ick, worms and other bad stuff and die of a result.

  3. Goldfish will not survive in bowls. A lot of people think they can. They get big. They need a minimum of 40-55 gallon tank, or a pond big enough for them. An additional 20 gallons for each added goldfish. So you want two? You will need a 70-75 gallon tank. If they are kept in smaller tanks, their organs will grow but their bodies will not. So then their organs will get big and squash their little bodies and die as a result.

  4. My office allows people to have fish. I worry that it could get too hot or cold over the weekends when the temperature is not controlled. Am I being a worrywart? I don't want to get a fish to have it suffer. Thanks!

  5. I did this exact same thing with out the air. I used a random mint plant that I had on hand. And I have only done one partial water change. I also make sure to never over feed my fish. I do add tap water to the bowl once a week. I really wasnt sure what would happen but I have had this fish for over a year. He does live by a window and the mint is blocking most of the sun that comes in the bowl. Try it … it really works !!!

  6. …… I get that youn intended the message of this video to be, "If you're going to be uninformed and / or uncaring enough to have a fish tank in the first place, then at least have one with a filter", but honestly, It came across as more of a "how to" video about how to blatantly disregard the particular care requirements of your fish – It was difficult to watch as that poor beta kept swimming to the surface, over and over again, searching in vein for the surface air he badly needed – Your videos are usually such a great resource, which is why I know you know better!

  7. I know this is a old video and you probably won't see and/or reply to this but, 1. How's your Betta? and 2. Where did you find the plastic pot and it's holder? I've looked everywhere and can't find one.

  8. A Betta fish breath air and will drown if not getting air from the surfas. Please take this video out and make another beautiful video with a fauna who can live submersed and can be housed in a bowl, (like dwarf shrimps and snails). Thank you!

  9. My advice to newbies is to start with at least a 20 gallon tank.
    Never use the picture on packaging labels to determine how many fish you can keep in it. In those pictures the tanks are dangerously overstocked. The rule of thumb is to allow for 1 inch of fish per gallon of water you have in your system. Keep in mind that your fish will grow after you bring them home from the pet store, ask about how large they can get. Do not get plecos to clean your tanks algae! These fish grow well over two feet and a well maintained tank will not have algae problems! On the same note, otocynclis aka Chinese algae eaters also grow to almost 3 inches and at that size they almost never clean enough of the tank to be of any use for that purpose. They can also become territorial and aggressive to other fish. Your best bet is to simply remove the algae that does grow on your glass yourself.
    On the subject of fish stores, if it is at all possible, get your fish from specialist stores and fellow hobbyists. My running joke is the end trajectory of the fish keeping hobby is opening a fish store. These guys have been keeping fish for years on end and are full of advice and will not hesitate to share it with you. Pay attention to how they keep their display tanks, a dirty tank is a sign that the shop isn't keeping up with their livestock. A reputable dealer will take great pride in the condition of their tanks.
    Do not stock your tank to the maximum limit until you have a good grasp on how the nitrogen cycle works, and how your husbandry plays in to the cycle. You will need to change your water once a week. Period. Full stop. Completely closed cycle fish tanks are difficult and fiddlly and even they require water changes as debris still builds up from fish waste. If you don't like the idea of shuffling around buckets of water, look into getting a hose length siphon, you can route the waste water straight to the drain. It makes life much easier.
    My final bit of advice is to get a water test kit and know what the chemicals you are testing for mean to your fish. Use it along side your water changes to detect little problems before they become big problems. Your goal is to keep the water more or less chemically static from week to week. A sudden change can mean something has gone wrong. Make sure you test the water straight out of your tap as well, so you understand what it is you are putting in your tank. Ideally you want water that has no nitrates, chloramines, and a neutral ph. Do not stress too hard if you have hard or soft water in your area, fish sold in those environments are usually adapted to them. If you have nitrates or chloramines in your tap water you are going to have to use chemicals to neutralize them. Do not use chemicals to maintain your tank in leu of good husbandry and proper stocking however.
    That's all I can think of for a YouTube comment, there are tons of books about keeping the fish you are interested in, take a trip to the library and find out their specific needs.

  10. Hey @The King of DIY 🙂
    I've Planted My Large Bowl Which has 2 Medium Goldfish with Pothos a day ago on the Top of the Fish Bowl, I've Also Provided the Oxygen Pipe inside the Bowl !
    I Have Few Doubt's

    1. My Fish Bowl is placed at Dark place in my Home, Will This Plant Pothos Require Sun Light (Compulsorily) to Live/Grow ?
    2. I Have Directly Took the 2 Stems from my Garden Including some portion of the roots Also and Placed it Over the Aquarium Is That Okay For the Plant or will it Die ?

  11. I had 3 poor gold fish in a bowl with this type filter I made from this video they are still alive and I think I've had them for about half a year . I finally got them a 36 gallon aquarium and it's being cycled as we speak . 🙂

  12. I mean , no hate , but you are not supposed to put a betta fish in a tiny bowl like that , and they won't feed off of the plants roots , betta fish need at least a five gallon tank for every 1 betta fish,

  13. It'd be a neat project to go all out with this and come up with crazy solutions for all the problems with fish bowls; semi-automated water changes, a feeding system, some kind of system for testing water parameters, integrated heating and lighting etc. Then look at all the finance and time resources that have been poured into it and say "Of course, if you just spent the $60 on a tank, the fish would do better".

    I will say, though, if you are willing to put in a lot of time with maintenance and are very quick to spot any issues (i.e. knowing exactly what to look for and how to treat it), it is possible to keep a betta in a large bowl and for them to live a full and reasonably happy life. Why anyone would opt to do that, though, is beyond me.



HOW TO: A complete aquarium filter – ALL IN ONE TUTORIAL