setting up new 75 gallon tank

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hellimonster created the topic: setting up new 75 gallon tank

We are setting up a new 75 gallon tank with 2 tiger oscars that are 1-1/2 inches long and a pleco 7 inches. We currently have underground filter with mesh tidy to protect the UG filter and filstar xp3 canister filter and one 12-inch air bubbler bar. Also, brown rock, piece of driftwood and two plastic plants. Would that be sufficient for a while. Thanks in advance for your input!
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jmunroe replied the topic: Re:setting up new 75 gallon tank

I just responded to your we are new thread but I'll say welcome again. So welcome to OFL. Your 75 gallon will be great for an oscar. If your not familiar with oscars, let me give you some insight. They grow fast and they are messy heavy bio load fishes. That's why I say your 75 will be great for an oscar, but really only one oscar and certainly not another heavy waste/bio load fish like a pleco. A common pleco will require that size tank to himself as well. Something people don't realize is how messy and how big the load is with a pleco. They quite often get one thinking that it will help keep their tank clean. This often comes under the advice of LFS employees that don't know, don't care, and just want to make a sale. So the best possible thing for you to do is pick which oscar you really like and focus on that as being your new pet. They really are like water dogs. And return the pleco and the other oscar. Your life will be much easier and your fish will live a better and longer life. With the other oscar in the tank and a pleco you'd need to do constant, large water changes to keep them from living in a poison environment. Don't worry about how small your oscar looks by himself in the 75,,, trust me he will soon fill it. Keep your heater set so your tank will stay around 80-82F. For filtration you'll want to get rid of the under gravel filter. They just don't work well with large digging fish. Oscars can move large rocks, large wood, and large piles of gravel everywhere. This makes the ug filters not function properly. Also ug filters tend to hide waste and debris which will make keeping water quality good next to impossible with oscars. The xp3 will be good but I would suggest also getting a large HOB filter as well. Get yourself the API freshwater master test kit and monitor your ammonia, nitrite, and nitrate levels. Give us the numbers from those test and we can tell what you may or may not need to do. Once your tank is cycled well, do 50% water changes when your nitrates hit 20ppm. Good luck and you came to the right place.

Go do a water change - the solution to pollution is dilution.
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Suprd71 replied the topic: Re:setting up new 75 gallon tank

Hello and welcome. jmunroe got you covered very well, never bad advice given on this site. Stick around and enjoy, there's lots to learn.


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ehh replied the topic: setting up new 75 gallon tank

The tank might look empty now but in eight months it's going to be pretty stocked.
I have my 9 inch red Devil in a 75 gallon and he fills it up.
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hellimonster replied the topic: setting up new 75 gallon tank

So confusing with all kind of feedback LOL> So many people and all you see on web shows they have 2 oscars living great in 75 gallon tank. hmmm may have to just do with it for now then look for bigger one soon ?
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Suprd71 replied the topic: setting up new 75 gallon tank

2 Oscars do not live great in a 75g tank. These are fish that can exceed 16ins and live 15 yrs... that wont happen in cramped quarters. Keep in mind that healthy well cared for Oscars grow about an inch a month for about 9 months. If you intend on keeping both, you will need a MINIMUM 6ft 125g tank in no longer than 3 months from now. You may also find that your 2 are just not compatible, this is not uncommon, and territory and aggression issues are further compounded with insufficient living space. I would strongly suggest, while you go thru the learning curve with this type of fish, that you raise a single in your 75. If you really take to the hobby, you will want another tank anyways, but for now concentrate on 1 tank and 1 fish.


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jmunroe replied the topic: Re:setting up new 75 gallon tank

99% of the oscars you see being kept on you tube ect.. Are being kept in improper conditions. As well as the water quality being too hard to keep good, it's hard to get 2 oscars to live together without one being bullied to death as they mature and fight for territory. Have you seen 2 adult oscars in a 75? Doesn't leave much room for roaming. They do like space. You would need to change at least 50% of the water a day to keep them healthy, and that'll happen before they get too big. This is the best site to listen to for oscar and large cichlid advice... any cichlid for that matter as well as a host of other fish. You won't get conflicting advice here, just what's best for your fish advice.

Go do a water change - the solution to pollution is dilution.
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jmunroe replied the topic: Re:setting up new 75 gallon tank

Suprd71 wrote: 2 Oscars do not live great in a 75g tank. These are fish that can exceed 16ins and live 15 yrs... that wont happen in cramped quarters. Keep in mind that healthy well cared for Oscars grow about an inch a month for about 9 months. If you intend on keeping both, you will need a MINIMUM 6ft 125g tank in no longer than 3 months from now. You may also find that your 2 are just not compatible, this is not uncommon, and territory and aggression issues are further compounded with insufficient living space. I would strongly suggest, while you go thru the learning curve with this type of fish, that you raise a single in your 75. If you really take to the hobby, you will want another tank anyways, but for now concentrate on 1 tank and 1 fish.

So many fish and tanks have failed because of the lack of understanding of this.

Go do a water change - the solution to pollution is dilution.
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Rocksor replied the topic: setting up new 75 gallon tank

hellimonster wrote: So confusing with all kind of feedback LOL> So many people and all you see on web shows they have 2 oscars living great in 75 gallon tank. hmmm may have to just do with it for now then look for bigger one soon ?


Living great for how long? Most people are unable to keep them past 4-6 years. Many of those same people who have 2 adult oscars in a 75g are not testing the water. They would be surprised at how much work is involved to keep nitrates below 20ppm if they tested the water.
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hellimonster replied the topic: setting up new 75 gallon tank

I see and I do appreciate the valuable information. It is very important to me and my wife as we love right care for right species no matter the work or cost. (:
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