The water in my tank is very hard. Not exactly sure why - out of the tap it is not but it definitely is in the tank. I thought I’d try throwing a water softening pillow in one of my filters. Is there any known sensitivity for Dats, Pbass or Rays? The package says I’ll need about 900g for my 240gal. Looks like I’ll need to order more but I thought I might go ahead and start with what I got. It may affect the PH so I’ll want to monitor that. Anything else I should be worried about?