mixing frontosas with central americans?

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The biggest problem here is territorial display issues. Very few of us actually try to change water chemistry, unless you are trying something extreme. It is generally more trouble than it is worth. Consistency is better than absolute values most of the time anyways.

The old world and new world cichlids are far apart evolutionarily speaking and they dont recognize each others territorial displays much of the time. This sets up a situation where a minor scuffle turns into a battle to the death.

Also, your tank is way overstocked as it is if the all grow to full size. Not a lot of room for big caves to make the fronts happy.

Fronts are generally passive, but I have had a few that rival any south american when defending a breeding territory.

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Frontosa and CA both came from alkaline water, so there is no contradiction in water requirement. Frontosa and many CA are big fish, so there is no incompatibility in size. There is wide range in temparament with CAs though. As long as the CAs are not flowerhorn, trimac or Mida calibar fish who won't even tolerate their own reflection, I don't see why Frontosa can't be kept with CAs. JD and Oscar are rather skittish fish and will likely be bullied, and Frontosa are hidden bully and don't show the aggression until they get big and do the dirty work in dawn and dust you least expect. I had one 11 inch Frontosa that wiped out my full grown Green Terror, Malawyian compressisep and Moori one by one. The only sign was that the normally peaceful Front suddently turned aggressive at one fish. The Front was so powerful that it didn't take much of his effort to bully the fish to dead the next day.

How about this Frontosa / Flowerhorn poster. Aren't they big brothers?

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overstocked i dont think so i have 6 fish in a 125with around 1100GPH of filtation people who think a 125 is for 2 or 3 fish either have to much money or like tanks with single fish. this tank as little to no aggresion and the oscars are all rescued from tanks 55 or smaller.
 
overstocked i dont think so i have 6 fish in a 125with around 1100GPH of filtation people who think a 125 is for 2 or 3 fish either have to much money or like tanks with single fish. this tank as little to no aggresion and the oscars are all rescued from tanks 55 or smaller.

While "overstocked" is a term that is.... Different from person to person. Yes, you are quite overstocked. I overstock all my fish tanks, I can admit it, I have problems. However my nitrates always stay below 10 with the gigantic waterchanges I do. Realistically, one adult oscar should have atleast a 125. That jag and JD full grown wouldnt fit in the 125 with just them. So yes, you have too many fish that get too big for your size tank. Imagine a 2 foot jag in a 125, my god.
 
While "overstocked" is a term that is.... Different from person to person. Yes, you are quite overstocked. I overstock all my fish tanks, I can admit it, I have problems. However my nitrates always stay below 10 with the gigantic waterchanges I do. Realistically, one adult oscar should have atleast a 125. That jag and JD full grown wouldnt fit in the 125 with just them. So yes, you have too many fish that get too big for your size tank. Imagine a 2 foot jag in a 125, my god.
i don't think he is over stocked, yes a 125 may be to small for a jag but his is like 5" right now
JD full grown wouldn't fit in a 125? my god
 
i use to have a front in with an oscar jag jd and green terror and it was fine. it even had territorial disputes with the jd, it was pretty funny
 
all depends on your fishes tmperment tho, the front was the first one in my tank then i added the rest in. if you add a front in to an already established tank things could go wrong
 
overstocked i dont think so i have 6 fish in a 125with around 1100GPH of filtation people who think a 125 is for 2 or 3 fish either have to much money or like tanks with single fish. this tank as little to no aggresion and the oscars are all rescued from tanks 55 or smaller.

If you're bored with the number of fish in the tank then switch it up to a community tank. This is simply how it works.

And the issue isn't us having too much money so much as you not having enough. Keeping large fish isn't cheap,even with rescued stock.

You need to be able to meet the fish's basic requirements, and there's nothing bourgeois about that. Thems the basics.

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