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Originally Posted by Lilcuty18 Hi there. This is my frist fish forum and I'm glad to be here. I currentlyt have a 90 gallon fish tank up and running for about 7 months. I decided to replace the sand i had before for Carib Sea black and white sand for aesthetic purposes. I checked my water parameters and it was fine. the 3 tangs that i recently bought got ick within 24 hours. i was wondering if adding 40 pounds of live sand could have stressed them out or if i added too much at the same time? thanks for all your help
Paula | The sand might cause a small spike in ammonia, which may cause some stress which could lead to ich. I wouldn't worry though if you have an established system.
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30g reef tank, CPR CY192 filter w/ DIY plumb running Rio 17HF return, Coralife 3x 9w UV Sterilizer, 3 24W T5-Helios 10K Daylights/3 24W T5-Helios Blue lights, 2 Logysis blue meteor light strobes (moonlights/24 Blue LEDs).
Tiger tail cuke, asst. snails/hermits, asst. feathers, rainbow acan,zoos,shrooms,bubble,galaxea, asst. shrimp, 2 ocellaris,mandarin,zebrasoma xanthurum,pink-spot watchman,red-striped pistol. | 
Will adding more sand to established tank produce ick? 
