asian arowana dragon fish

Yihan ball hard water seeking a solution

　　Same problem, 　　= (Comments on alliance SianLon Arowana Aquatic friends) = 　　Left Bank Amber Say: It seems that good filters will hard water...

What kind of variety is this？

　　I posted a picture post, everyone take a look ~ 　　= (Comments on alliance SianLon Arowana Aquatic friends) = 　　18613515088 Say: Red DragonYu...