What are good species to pair with angelfish?

Everything was just dumped. So I had to start fresh.once I got the tank setup I went ahead and put the last live angel in, might have been an bad idea but the lady said they were in bucket for a few hours. Luckly the one angel did survive so far. My ph levels are still high tho last night it was at 8.4. Should I wait 24 hours to retest?
 
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What kind of tools do you used to check the pH level?
What did you do to reduce the pH levels?
 
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