oscar growth rate

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oscar growth rate

Postby drkstr7 » Sat Feb 23, 2008 2:29 am

i know this question has probably asked alot.
how fast can an oscar grow in a month or a year
i got my oscar 2 months ago and it was 2 inches
now its about 5-6 inches
is this normal or have I been talking bad care of him?
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Re: oscar growth rate

Postby v-tachgeezer » Sat Feb 23, 2008 3:18 am

If given the correct housing and diet, oscars can generally grow about an inch a month in the first year generally slowing down after 10". They can grow to 16" but 12" is often more typical.
Yours seems to be growing very fast which does point to good care- how big is your tank? What tankmates, if any, do you have? What are your parameters for ammonia, nitrite and nitrate, pH and temp?
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Re: oscar growth rate

Postby nam macs » Sat Feb 23, 2008 1:53 pm

Yours seems to be growing extremely fast! I've always been told that normal is about an inch a month, until they are about 7 or 8 inches, then growth slows down to an inch or two a year, until they reach their max size and stop growing.
Hopefully, if my new landlord isn't a jerk, I can set up my 90 gallon again :D
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Re: oscar growth rate

Postby OscarbitteninOhio » Sat Feb 23, 2008 3:17 pm

With good care, the average Oscar can grow a month per inch until they hit the 8 to 10 inch range. Note that I said AVERAGE....some Oscars will grow slower than an inch per month, others will grow faster than an inch per month. Some will see their grow rate slow down before they hit the 8 to 10 inch range, others will continue to grow quickly even beyond the 10 inch range. And some Oscars will be a mixed bag, growing quickly from 2 inches to 5 inches, growing slower until they hit 8 inches, then suddenly shift back into high gear and zoom to 12 inches. It's all determined by genetics, nutrition and environment (water parameters and such).

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Re: oscar growth rate

Postby Whiplash4ever » Sat Feb 23, 2008 3:23 pm

A month per inch huh? :mrgreen:


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Re: oscar growth rate

Postby drkstr7 » Sun Feb 24, 2008 12:36 am

the tank is a 50 g
his tankmate is a gold nugget pleco(grows max of 4.5 inches)
the temp is 29 C
i have never tested the water
is it better to test the water?
if it is then what do i have to buy?
and how many time do i test it a month?
and i think the O is 6.5 inches now
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Re: oscar growth rate

Postby drkstr7 » Sun Feb 24, 2008 12:39 am

i feed him hikari cichlid gold mini pellets
about 30 pellets, 3-4 times a day
and do a water change about 1 time a week
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Re: oscar growth rate

Postby v-tachgeezer » Sun Feb 24, 2008 1:08 am

Water testing is vital to the well being of any fish-particularly one with such a high mass and bioload. An API liquid test kit is recommended by most on this site and will set you back around $20-$30 where you are. This will test your water for ammonia, nitrite, nitrate and pH. I usually test the water every few days. If the tank is cycled, then ammonia should read 0 (if you have ammonia you have a problem) nitrite should read 0 (if you have nitrite, you have a problem) nitrates-try to keep these under 20ppm or within 20ppm of your tapwater. pH- avoid extremes-test tapwater and keep constant. Test your tapwater on all parameters to provide a baseline.
Given your stocking levels then Id say 1-2 large volume >50% waterchanges per week. You are rather overstocked. The gold nugget is small and could end up as a meal for the oscar and 50g is the absolute bare bones minimum for one Oscar with no tankmates. In this light Id recommend re homing the gold nugget.
Temp-high end of acceptable-dont let it get hotter in there!
Regarding feeding-just feed enough 3 times per day that the fish will eat in 2 minutes-an adult in a maxed out tank I d feed just once a day. Overfeeding can very quickly cause water quality issues
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Re: oscar growth rate

Postby drkstr7 » Sun Feb 24, 2008 1:50 am

thanks
what brand of test kit should i get
lol im 13 yrs
can you dumb the gramer for me?
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Re: oscar growth rate

Postby scrivz » Sun Feb 24, 2008 2:06 am

API is the brand of test kit that v-tach recommended, and I also recommend it, as do many people on this forum. It looks like this:
Image
Almost every fish store sells them, in my experience. As far as simplifying what v-tach said, ammonia is a chemical that is in the waste produced by your fish, and it is a poison to your fish. There are bacteria that live in your tank and filter that convert the ammonia to nitrite, another chemical. Unfortunately, nitrite is also poisonous to your fish. Luckily there is a second kind of bacteria that live in your tank and filter that convert the nitrite to nitrate, which is another chemical, but is much safer for your fish. Nitrates are not totally safe though, which is why the test kit comes in handy. If your test kit ever says the nitrates are ever over 20ppm you need to change a large portion of the water in your tank. With an oscar this is usually a once-a-week activity to keep the nitrates down in the safe range.
Image
A "cycled" tank is an aquarium that has both kinds of bacteria needed to keep your fishes' waste from being poisonous to them. You can tell if your tank is cycled with the test kit. If ammonia=0, nitrite=0, and nitrates register as any number greater than zero, your tank is cycled. If there is any ammonia or nitrite more than zero, your tank is not fully cycled. Your fish will only be healthy in a cycled tank. Hope this helps.

By the way, it's nice to see a 13 year old interested in taking proper care of an oscar; it shows a level of maturity that I definitely did not have at that age.
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Re: oscar growth rate

Postby OscarbitteninOhio » Sun Feb 24, 2008 9:40 am

Whiplash4ever wrote:A month per inch huh? :mrgreen:


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Had that a bit backwards didn't I?

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Re: oscar growth rate

Postby OscarbitteninOhio » Sun Feb 24, 2008 9:43 am

scrivz wrote:By the way, it's nice to see a 13 year old interested in taking proper care of an oscar; it shows a level of maturity that I definitely did not have at that age.


Heck, it shows a level of maturity I still don't have at nearly 39.

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Re: oscar growth rate

Postby Burbage » Sun Feb 24, 2008 8:23 pm

The nitrogen cycle illustration above is good as far as it goes, but it is missing one crucial factor. Food. In fact the fish can essentially be removed from the cycle as well. In the end the rate of nitrate build-up in a cycled tank depends on how much food you put in the tank. Less food, less nitrate.

As far as growth rate is concerned, the objective of all baby fish is to become adult fish (it means there are fewer enemies that can eat them). This means that while they are small they'll have a very high growth rate and a very good conversion of food to fish. As the growth rate slows they use less and less food, because their growth rate begins to be limited by other factors such as the power of the heart to oxygenate the large body, the range of the neural system, mechanical limitations of the skeleton, etc. At this point the fish will grow much more slowly.

What all this means is that fish (unlike humans and other warmblooded animals) need far less food as adults than they do when they are growing. The other thing is that while an oscar can attain a high growth rate at small sizes, it doesn't need to. The growth rate will depend entirely on the availability of food. If you feed 1g of food once a week, then the oscar will grow more slowly than if you feed 1g of food once a day.

The good thing about fish is that they need hardly any food at all. And that means that you can keep the nitrate levels low by not feeding very much. If you feed 1g of food once a week then you'll have to change seven times less water every week than if you feed 1g of food every day.

One caveat to this general rule is that breeding females, of course, will need more food, because you want them to produce eggs.
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