Regular Member stech Posted March 1, 2015 Regular Member Share Posted March 1, 2015 NYC tap water ph is 7,0 and I am afraid it my drop after few days. I am thinking of using 4.5 cups of crush coral in a AC 110 for 90 gallon tank. I don't have any fish yet still in planning stage. Is safe to use crush coral and should I set AC 110 for low or high flow? 0 Quote Link to comment Share on other sites More sharing options...
Regular Member GoldenSpoiledRotten Posted March 1, 2015 Regular Member Share Posted March 1, 2015 Test your water this way to see if it drops: You'll need the following: 2 buckets 1 airstone/pump pH testing kit Tap water dechlorinator 1. fill both buckets with tap water and add the right amount of the fish's dechlorinator for each bucket. 2. Test the pH in each bucket, writing it down for safekeeping. 3. Add an air stone to one of the buckets and have it running. 4. Wait 24 hours. 5. Test the pH in each bucket again. Check with the original pH for change. 6. Report the results here in this thread so that we'll know if there will be a risk of pH drop and how much of what kind of buffer you will need, if any. Fins crossed you won't need one. 0 Quote Link to comment Share on other sites More sharing options...
Regular Member troy.telford Posted March 1, 2015 Regular Member Share Posted March 1, 2015 One thing that may help: check out your local tap water's water quality report. You said NYC, so its report is at: http://www.nyc.gov/html/dep/html/drinking_water/wsstate.shtml Telling us the GH and KH of your tank's water will be helpful. 0 Quote Link to comment Share on other sites More sharing options...
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