Get the test kit with liquid as its a lot more accurate than the test strip type.
The API Freshwater Master Test Kit usually retails locally for around S$40-$50 (depending on LFS pricings and any promo discounts/offers), check at places like C328, Polyart, Seaview etc.
Make sure to check the expiry date of the test kits and try to avoid those which are old stock.

Get the test kit with liquid as its a lot more accurate than the test strip type.
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