Chris O Posted March 20, 2021 Share Posted March 20, 2021 Hi All, First off I want to say thank you to the whole community. I've found this forum to be really helpful from the day I began in this hobby over 2 years ago. I noticed over the course of approx. 1.5 months that my green star poly has been slowly doing worse. It used to open full bloom, but now it rarely opens. I've notice it opens less and less frequently. At the same time, most of my other corals are doing fairly well (Birdsnet, frammer coral, Zoas, Nuclear Palys, zoas, pandora palys). This past week, I noticed the birdsnest growth slowing and the polyps not quite fully extended. I suspect the culprit is low nitrates based on how the the GSP was impacted first and by the way it has reacted over time. Before I make any changes, I wanted to see if other folks agree. Here are my parameters: API tests Ammonia: 0 Nitrates: 0 Nitrites: 0 pH: 8.4 Salifert tests Calcium: 430 Alkalinity: 8.6 Other Salinity: 1.0275 Temp: 78 f I've included some pictures of my tank and GSP for reference. I presume that white thing growing on it is a sponge of some sort? Nitrates make the most sense to me as the problem as it's a nuvo fusion 20g tank. I run an eShopps nano protein skimmer, do 30ish percent water changes weekly, change the filter pads twice a week, and only feed my fish every other day. Livestock includes 2 clowns, 1 coral beauty angelfish, 1 bangaii cardinal, 1 cleaner shrimp, and 4 snails. Thanks, Chris Quote Link to comment
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