| Re: Hello everyone! I need of help. Welcome. Salinity is a bit low. I believe on a natural reef it runs closer to 1.025. There are buffers out there that can keep the ph higher, but kalk in your top-off is the best method. Depending on the bio-load 1-2tsp per gl of top-off water will keep it at around 8.4 and higher and 30mg distilled vinegar per gl along with the kalk will usually keep it at around 8.3 plus the kalkwasser will help to precipitate the phosphates out. |