i have had my tank for 3 mo
., 92 gal
tank 3 in. live sand 65 lbs lr
., sump with protein skimmer and bio balls. i have 2 stars numerous crabs, snails, cleaner shrimp,mushroom corals 2 anenomes. everything is doing fine but my fish got a disease so i pulled them out and put them in a quartine tank 2 weeks ago. i have coraline algae growing on the rocks, my question is about my amonia, nitrate levels, i cant get them to 0 my ammonia stays at 25ppm and nitrate 20 ppm
nitrite 0 , ph
8.3 i dont have a akaline tester. what could be the causes of this with no fish.