Adding a lemon oscar to a 125 with Peacock Cichlid's

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To the OP, I would not add an O to that mix of Africans. As far as your LFS, bad advice. IMHO an adult Oscar requires a minimum of 100 gallons.

How come? Would the oscar kill the peacocks/haps?
 
How come? Would the oscar kill the peacocks/haps?

A large portion of your peacocks are hybrid crosses (mbuna x Aulonocara) so while your Oscar is small, and being added last, it will probably be picked on. Later as the O matures, it will probably kill some of the peacocks. That, and with the resulting bio load of all of these fish you will find yourself a slave to water changes as the O matures.
 
The pump is quiet, but I keep the HOB falling 3" for lots of aeration. Eventually that will go to another tank too.

I don't have the dream sump setup at all, and when I put SW in this tank it will change a lot. I'm really feeding the media a lot, and running extra media in other sumps too, as I'll need extra media for the new tanks.

I've got a strange assortment I inherited as rescue fish, plus a few I have added when I moved them to a larger tank. There's one Golden Mbuna and a hybrid female that looks like a blue johanni male. The hybrid female is attached to Buttercup in his colony. The fish chase each other around until the big pleco thinks it's feeding time;and then he starts to thrash and everyone hides for a while.

It's a lot more action that my other tanks, usually. I took out the 2 convicts and one male peacock, which did the trick until Leeloo had babies. Now the aggression is back up. It's a matter of days until I can move the Africans to the 125, so I just keep moving their stuff around and changing the water to keep them off kilter a bit.
 
OP: My opinion if you originally wanted the 125 for the Oscar and still feel the itch to have one then you should do it; you'll be glad you did. They are so endearing and fun to own, people talk about amphs and parachromis being the kings of personality but it's hard for me to imagine a fish more like a dog than my Oscar. I'm obviously passionate about Oscars so take my advise with a grain of salt.

So to eleviate some concerns for the Oscar: At 5-6 inches, when the Oscar would be the dominant fish I'd put him in the 125. Keep the 29 to rehome other fish you have to reduce the bioload as needed. You'll fall in love with your Oscar when it matures and it will be easy to decide who stays with him and who goes, it will all be about him/her once you fall in love with his ridiculous antics. Start with the Africans or get rid of them before hand. I'd love to try raising a lemon Oscar but am maxed out on tanks at the moment. With the exeption of the ones they call ruby reds the lemons are my fav color morph (if that's what you call it).
 
IF you can convince your wife to setup the 75 again. Use it to rehome some of the fish in the 125... that would give you the best of everything. In a 75 you can keep a healthy Oscar but the 125 would be the only option if you want to keep other fish with him/her.
 
Tbh get that oscar I see so many cramped in small tanks I think you will be fine just do lots of water changes when the Oscar gets bigger.
 
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I'm not to worried about bio load. I do weekly 50% waterchanges plus the 29 gallon wet dry filter I have running around 1000gph plus the eheim.

My only real concern is the oscar not dying to the peacocks and vise vera.
 
I'm not to worried about bio load. I do weekly 50% waterchanges plus the 29 gallon wet dry filter I have running around 1000gph plus the eheim.

My only real concern is the oscar not dying to the peacocks and vise vera.
My friend keeps a lemon jake peacock and electric blue hap with 2 oscars and the oscars are smaller and do fine.
 
I do weekly 50% waterchanges plus the 29 gallon wet dry filter I have running around 1000gph plus the eheim.

I do 85% weekly water changes, and I have a single 13-14" 7 yr old male cichlid in that 125 gallon tank. And most would consider my feeding amount to be middle of the road, to more on the sparingly side. I also run three AC 110's on that tank. https://www.monsterfishkeepers.com/forums/threads/my-midas.716325/


I've also kept numerous species of African cichlids, over many years. https://www.monsterfishkeepers.com/forums/threads/africans-from-the-past-warning-pic-heavy.716020/

Good luck
 
I do 85% weekly water changes, and I have a single 13-14" 7 yr old male cichlid in that 125 gallon tank. And most would consider my feeding amount to be middle of the road, to more on the sparingly side. I also run three AC 110's on that tank. https://www.monsterfishkeepers.com/forums/threads/my-midas.716325/


I've also kept numerous species of African cichlids, over many years. https://www.monsterfishkeepers.com/forums/threads/africans-from-the-past-warning-pic-heavy.716020/

Good luck

Good to know! Thank you!
 
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