API Tapwater Conditioner - 36ml (1.25oz)
Pack size
36 mL
Cost per litre treated
Under 1c
Water type
Freshwater + Marine
Bottle treats
820 L
Dose rate
5 mL per 114 L, chloramine
Chlorine dose
1 mL per 38 L
Works
Instantly
API Tapwater Conditioner - 36ml (1.25oz)
One small bottle detoxifies hundreds of litres of tap water. API Tap Water Conditioner is a concentrated dechlorinator from Mars Fishcare that neutralises chlorine, chloramine and heavy metals in a single dose, so treated water is safe for fish immediately. This 36 mL (1.25 oz) bottle is API's standard retail starter size.
Key features
- Neutralises chlorine, chloramine and heavy metals – including copper, lead and zinc – in tap water, in one dose.
- Works instantly – no standing time before treated water can go into the aquarium.
- Highly concentrated – 1 mL treats 38 L for chlorine and heavy metals, or 5 mL treats 114 L for chloramine.
- Active ingredients: sodium thiosulfate (30.2%) and EDTA tetrasodium salt (9.8%).
Specifications
| Size | 36 mL (1.25 oz) |
|---|---|
| Active ingredients | Sodium thiosulfate 30.2%, EDTA tetrasodium salt 9.8% |
| Concentrate pH | 10–12 |
| Water type | Freshwater and saltwater |
| Freight | Standard – not classified as dangerous goods for transport |
Which size do I need?
This 36 mL bottle treats about 820 L at the chloramine dose.
| Size | Treats (chloramine dose) |
|---|---|
| 30 mL | 684 L |
| 36 mL (this bottle) | 820 L |
| 118 mL | 2,690 L |
| 237 mL | 5,403 L |
| 473 mL | 10,784 L |
| 3.8 L (1 gal) | 86,640 L |
Dosage and directions
Measure with a dosing syringe and add directly to tap water before or as it goes into the aquarium.
- Chlorine and heavy metals: 1 mL per 10 US gallons (38 L)
- Chloramine: 5 mL per 30 US gallons (114 L)
Unsure which disinfectant your water supplier uses? Dose at the chloramine rate to be safe – it treats less water per millilitre but neutralises both.
Suitable for, and not suitable for
Suitable for:
- Freshwater and saltwater (marine) aquariums
- Conditioning tap water for water changes and new tank set-ups
- Everyday small to medium home aquariums
Not suitable for:
- Dosing directly into a stocked, running aquarium at more than label strength – treat new water separately first
- Large systems needing frequent bulk water changes – the 3.8 L bottle works out more convenient
Safety
The concentrate carries hazard warnings from API's Safety Data Sheet: "Causes severe skin burns and eye damage" (H314), "May cause an allergic skin reaction" (H317), "May cause respiratory irritation" (H335), and "Very toxic to aquatic life" (H400). Wear gloves and eye protection when handling the concentrate and store locked up away from children and pets. If swallowed, rinse the mouth without inducing vomiting and seek medical attention; for skin or eye contact, rinse thoroughly with water. Once diluted into aquarium water at the label dose, the treated water is safe for fish.
Goes well with
- API Freshwater Master Multi Test Kit 5 in 1 – check chlorine, chloramine and ammonia before and after dosing.
- API Tap Water Conditioner (118 mL / 237 mL / 473 mL) – step up to a bigger bottle once you know your routine.
Warranty and delivery
Covered by the consumer guarantees under Australian Consumer Law, including that it's of acceptable quality and fit for purpose. Contact us if a bottle arrives faulty or damaged. Ships as standard freight – not classified as a dangerous good for transport.
Common questions
How much do I use per water change?
1 mL per 10 US gallons (38 L) for chlorine and heavy metals, or 5 mL per 30 US gallons (114 L) if your supply is chloraminated – most South East Queensland mains water is.
Do I need to wait before adding fish after dosing?
No. API states the conditioner works instantly, so treated tap water can go straight into the aquarium.
How is this different from the 30 mL bottle?
Only the size differs – same formula, same dose rate.
Is it safe for invertebrates and live plants?
The label states the product is safe for all aquatic life in fresh and saltwater, but doesn't give specific invertebrate or plant wording beyond that. Contact us before first use on a shrimp colony or heavily planted tank to confirm suitability.
