How can you make water testing kit to clean the fish?

I have an aquarium and I'm going on vacation for a short and I have this thing feeds them automatically and read the back and told me to not work properly if the water quality in the part is too alkaline and I do not know how water quality is that if I wanted to know how to test water without test equipment cousin ran out everywhere and I'm leaving soon! Help!

You may not need a test kit that I bought over the Internet all my fish stuff off eBay and shipped the same day to pay for them and they get the day Next time you are out, because the fish can live with food for 10 days until 25% water change before you go and feed them, they'll be well

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