Steve A Posted June 25, 2021 Share Posted June 25, 2021 In getting my 80 gal tank ready to plant the folks at the Co-Op said to do a deep clean of my substrate as this tank has been in use for 18 years. I have done 3 cleanings of about 12 gallons and my nitrates are coming down from 160 to 40. The issue is that my GH has jumped from 89.3 nine days ago to over 214 today. I checked my tap water and it is 143.2. Any ideas as to what might have happened? The only additive I used was Chlorine remove. TIA Link to comment Share on other sites More sharing options...
Colu Posted June 25, 2021 Share Posted June 25, 2021 I have you add any new rocks 1 Link to comment Share on other sites More sharing options...
Steve A Posted June 25, 2021 Author Share Posted June 25, 2021 On 6/25/2021 at 4:56 PM, Colu said: I have you add any new rocks No, I have not added any thing to the aquarium in over 3 years except water with Chlorine remove and PH balancer but my PH was low so I have not used the balancer in the last 3 cleaning and the PH is up to about 7.5. Link to comment Share on other sites More sharing options...
Colu Posted June 25, 2021 Share Posted June 25, 2021 Nothing jumping out at me am not familiar with pH balances I just use crushed coral maybe someone else can chip in 2 Link to comment Share on other sites More sharing options...
Steve A Posted June 25, 2021 Author Share Posted June 25, 2021 On 6/25/2021 at 5:05 PM, Colu said: Nothing jumping out at me am not familiar with pH balances I just use crushed coral maybe someone else can chip in I have been using it for years, about a 1/2 thimble for every 5 gallons Link to comment Share on other sites More sharing options...
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