General Aquaria Discussion • Tap water no3 at 10ppm phosphate at 5ppm would you go RO?

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Tap water no3 at 10ppm phosphate at 5ppm would you go RO?

Postby Cichlid_beast123 » Mon Mar 04, 2019 11:55 pm

Keeping African cichlids basically I have discovered that my tap water is around 10 PPM for no3 phosphate at 5. I am aware that 10 PPM is not really that bad but I would prefer it to be a lot lower considering this builds. And it's common knowledge some fish don't like to breed in those numbers
should go down the ro route and remineralize ? Or maybe trying 75 tap water 25 RO water? I could see what the KH PH and GH would be with that mix but that wont reduce the no3 past 7.5 so I don't think it will be worth it
Anyway if you have any experience doing this please let me know many thanks
Tank (A) 120 Gallon 60" C.Moori, acuticeps, Red Empress, Blue Neons Buccochromis rhoadesii
Tank (B) 65 Gallon Grow out tank currently Otopharynx lithobates (Zimbawe Rock) Champsochromis caeruleus and Blue peacocks yellow labs
(Updated 27/03/2018)
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Re: Tap water no3 at 10ppm phosphate at 5ppm would you go RO

Postby fmueller » Tue Mar 05, 2019 5:08 am

My first action would be to double check test results. Test kits are not very accurate, especially when older. And the nitrate test is notorious for being difficult. 10ppm of nitrate is not ideal, but still won't be a problem for most fish. I might put in an automatic drip water change system to keep it at 10ppm at all times. That will probably be better than having it alternate between 0 and 20ppp from waterchange to waterchange.

Phosphate is not something cichlid keepers usually worry about. It's not harmful to fish but can only create algae problems. I'd rather deal with the algae, for example by adding snails or some algae eating fish, rather than targeting phosphate.

RO water is expensive, and bringing it back up to Rift Lake conditions is just a hassle. I would go to great length to avoid that.
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