Dropping PH (GH results)
Congrats on the new purchases; I’m sure you’ll find them to come in handy and no doubt useful. As your temporary hardness’ (KH) buffering capacity has apparently been exceeded — dropping in pH from 7.0 to 6.8 instead of being maintained — yes, I would add more crushed coral. While the amount of crushed coral to be added will vary proportionately with the KH you already have, the usual amount of this buffering material to be added to your filter (and/or to your tank via a nylon bag) is about 1 cup (16 Tbs) per 10 gallons, on average. You may or may not need anywhere near that amount, depending on those elements in your water which are counteracting the affects of your KH. I would start off slow, perhaps adding 6 Tbs of crushed coral, and go from there after allowing enough time to allow it to add to your KH. Happy Holidays and Season’s Greetings. Ray
Category: Philippines Internet Koi Society
