I live in a hard water are 15dKH and 20dGH, PH 8 … upgrading to a 110L tank in couple weeks, and would like to get more fish, I currently have 8 harlequin hasboras, got these before I did any research and from pets at home and they didn’t tell me about water hardness etc, so I need some tank mates that like hard water and would go well with harlequins cheers