Unless they are way outside the norm, I don't see KH/GH or TDS being an issue with this species either. IMO some people get a wee bit too anal when it comes to attempting to match the water parameters these fish experience in the wild. Clean, stable water parameters is the key.
I also disagree about adding additional leucosticta to this tank. Here's why .......
This tank is already having water quality issues, even with 30% water changes every 5 days nitrates are reaching 40ppm before the next water change. For a 120 gallon (I'm assuming with a standard 48x24 footprint) it's already housing; 2 Severum, 1 Threadfin Acara, 1 H. temporalis, 1 senegal bicher, 6 congo tetra 2 siamese algae eaters, 1 bn pleco, and last but not least 1 S. leucosticta.
IMHO if one considers the adult size of all of these fish, and their required territories, this tank is already stocked to the max.
Also, according to those who have collected leucosticta in the wild, over a number of various collection trips, these fish are never encountered in groups. In the wild adult "groups" consist of a pair, and only during the spawning season. So while adding a few more may help spread aggression issues as the tank aggressors will have more than one leucosticta target, in the end I believe it will create a tank where water quality will become more & more difficult to maintain.
I also disagree about adding additional leucosticta to this tank. Here's why .......
This tank is already having water quality issues, even with 30% water changes every 5 days nitrates are reaching 40ppm before the next water change. For a 120 gallon (I'm assuming with a standard 48x24 footprint) it's already housing; 2 Severum, 1 Threadfin Acara, 1 H. temporalis, 1 senegal bicher, 6 congo tetra 2 siamese algae eaters, 1 bn pleco, and last but not least 1 S. leucosticta.
IMHO if one considers the adult size of all of these fish, and their required territories, this tank is already stocked to the max.
Also, according to those who have collected leucosticta in the wild, over a number of various collection trips, these fish are never encountered in groups. In the wild adult "groups" consist of a pair, and only during the spawning season. So while adding a few more may help spread aggression issues as the tank aggressors will have more than one leucosticta target, in the end I believe it will create a tank where water quality will become more & more difficult to maintain.