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30 days return. Buyer pays for return postage. If you use an eBay delivery label, it will be deducted from your refund amount.
Condition:
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Ammonia - NH3
Nitrite - NO2
Nitrate - NO3
Hardness - GH & KH (Out of stock)
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Tests for hardness & alkalinity. Nitrate is produced by the beneficial bacteria in the aquarium and filters as they break down the toxic waste products. Nitrate is not toxic to fish, but excessively high levels can affect their reproduction.