This tool provides a general estimate and does not replace professional veterinary advice.
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What is the Discus pH Dosing Calculator?
The Discus pH Dosing Calculator calculates how much pH adjuster to add safely to discus tanks. Water quality is the single biggest factor in aquatic animal health. Far more animals are lost to poor water parameters than to disease introduced from outside.
A well-cared-for discus usually lives somewhere between 10 and 15 years. Diet-wise they are a carnivore, which shapes almost every feeding decision you make. Discus demand very warm, very clean soft water and near-daily water changes while growing. They are social and should be kept in groups of five or more. This is not a beginner species. The usual suspects for this species are hole-in-the-head disease, internal flagellates, bacterial infection from poor water, so any noticeable change is worth following up.
Discus quick facts
| Measure | Discus |
|---|---|
| Typical lifespan | 10–15 years |
| Diet | Carnivore |
| Mature at | About 1.5 years |
| Clutch size | 150–300 eggs |
How does the Discus pH Dosing Calculator work?
The figures are based on commonly cited aquarist rules of thumb and safe parameter ranges for discus, scaled to your tank or livestock details. The math is only as good as what you feed it, so an accurate, recent input matters more than the formula itself.
What changes the answer
- Tank size and current stocking level
- Filtration capacity: which affects how much waste the system can safely process
- Feeding habits: since overfeeding is a leading cause of poor water quality
- Source water quality before treatment, which varies by location
How do you use the Discus pH Dosing Calculator?
- Enter the current pH
- Enter the tank volume in whichever unit you use (US gal, L, UK gal)
- Answer "How did you test?"
- Press Calculate, then read the result alongside the sources listed below
Worth doing: jot down the date and the result each time. A single number tells you little, but a trend across a few months tells you a lot about your discus.
For related questions, see the other water tools or browse every discus tool.
Before you rely on this
Two discus with identical numbers on paper can still need different care. Breed or line, body condition, activity level and any existing health conditions all pull the real answer away from the average. If your discus has a diagnosed condition, is pregnant, or is very young or very old, treat the figure here as the loosest of guides and let your vet set the actual target.
Sources and references
The formulas, reference ranges and species data behind the Discus pH Dosing Calculator come from these veterinary references, professional bodies and published research.
- University of Florida IFAS ExtensionAquacultureedis.ifas.ufl.edu(opens in a new tab)
- Merck Veterinary ManualReptilesmerckvetmanual.com(opens in a new tab)
- ARAVAssociation of Reptilian and Amphibian Veterinariansarav.org(opens in a new tab)
- Merck Veterinary ManualExotic and Laboratory Animalsmerckvetmanual.com(opens in a new tab)
- Merck Veterinary ManualRoutine Care and Breedingmerckvetmanual.com(opens in a new tab)
- Built on veterinary referencesFormulas and ranges come from veterinary manuals, university research and welfare bodies, listed above for you to check.
- Instant resultsNo page reload, no waiting and no account. Enter your details and the result appears straight away.
- Private by designCalculations run in your browser. Nothing you enter is stored on our servers or shared with anyone.
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