So yesterday my cat was swimming at the top a lot. It wasnt acting weird other than that, except it didn't eat when I fed the tank. Usually it's the first one to devour everything. Woke up this morning to it lying on driftwood, mouth wide open and dead. Very sad had this guy since it was an inch. Filled the test tubs with water but didn't have time to run the tests (will do after work Is that ok?) And have pictures to post. Any ideas Why it died ?