Snakehead Gudgeon

[cichlid lover 89]

hi i'm new to this forum. I just bought 2 snakehead gudgeons for my african rift lake tank its 125 gallons does anyone know anything besides they're predatory get to 1 foot long?

 

[cichlid lover 89]

i also know they like hard water with a high ph im trying to add a pick but its now working?

 

[cichlid lover 89]

i figured out what was wrong here are some pictures of my new fish their scientific name is Giuris Margaratacea