RE: [RML] Questions regarding Rhadinocentrus

Matthew Stanton (matthews at
Wed, 14 Mar 2001 16:55:13 +1100

I just measured the pH in the tank behind my desk at work which is home to 3
Rhads and 3 P. mellis. The JBL test kit gave me 4.5 (chart in 0.5
increments) and the electronic gauge gave me 4.1. This is probably because I
don't do enough water changes in the work tanks. All fish seem happy enough.
3.8 is pretty acidic but I can imagine some Rhad habitats getting like that
naturally. The pH of our coastal acidic lakes is often low. Some of the
Queenslanders might have experience of low pHs in the Morton and Hervey Bay

> -----Original Message-----
> From: bowluvr [SMTP:bowluvr at]
> Sent: Thursday, March 15, 2001 1:53 PM
> To: rainbowfish at
> Subject: Re: [RML] Questions regarding Rhadinocentrus
> Thanks Matthew!
> I use the crushed coral to keep the pH from bottoming out... when it gets
> so
> low that Apistos are uncomfortable (3s), then I think the Rhads may not be
> happy either! Yes, it has gone as low as 3.8. The coral doesn't raise it
> above neutral unless I add about 5-times as much. :-)
> Julie <><
> > Julie,
> > I can't help you with the sexing but as to their care...
> > Toss the crushed coral. Soft acidic water is the domain of Rhads. In my
> > experience they never occur in hard water or in water that is alkaline
> even
> > when they are right next to the sea.
> > Temperature is less critical but avoid big daily changes.
> > Others on the list will tell you more about breeding, my only suggestion
> > being to toss them into a pond during the summer. Some of the colour
> forms
> > make great pond fish!
> > I hope you enjoy your Rhads.