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Chilanga's are a sp.red.

Sp.reds are the worst at making a hybrid fish, so you have got to be extremely careful which tropheus variant you pick.

Your 135 gallon with 7-10X filtration turnover, and regimented weekly/bi-weekly waterchange of 50-75%, can safely accomadate 30-40 Adult Tropheus.

If your going to add a second variant pick a number closer to 30 fish total, otherwise up your Chilanga's total if you want to add more fish.

The second variant needs to be Duboisi for 100% safe, otherwise with sp.red about the only thing that might be safe is annectens. With your chilanga dark body, brightly colored flanks, you've pretty much eliminated any chance to really put another in the tank without serious risk to hybridization from any of the other Tropheus species.

Hope this helps..

Geoff
 

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Until your wildcaughts are well established and have purged themselves really well, I would hesitate to mix in TankRaised Fish.

Sometimes wild fish bring in organisms that TankRaised fish have no exposure too, and can become ill quickly from, sometimes lead to massive die-off of the tank raised fish.

So be careful,...how long have your wilds been established?
 
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