200 G
wet dry filter
wave makers
UV
2 carbon reactors
1 GFO reactor
Dose - 2 PART from BRS
chiller and heater
everything runs on a RKE unit.
I tested the heater and chiller and both are functioning normally so I don't think my fish were hit with a huge temp. swing.
all other equipment is functioning as expected.
system has been running for 1.5 years. Over this time I have lost the occasional fish and have had some corals die but plenty are flourishing.
I think I'm good on maintenance. every month I change out 35 gallons of water. I use good quality salt with RO/DI water and I test to make sure it's reading 0 TDS.
earlier this week, within 2 day almost all the fish died. I had a mixture of Chromis, Tangs, gobies, cardinals and blennies. The only two that survived were farmed raised, oscelarous clown fish.
All the snails, hermits, crabs and conch are doing well. The zoas and star pollips are sucked in but they seem to be alive. I have a hard coral, don't know what it's called, and it seems to be doing fine. One of my scallops died but the other seems to be hanging on but doesn't look happy.
So far I've changed 50 gallons of water on Thursday to try and stabilize the situation. Before doing the change I tested my parameters and all came back normal except amonia which i suspect was elevated because of the fish die off. After the water change the clown seemed much happier.
Today the zoa and star pollips still don't seem happy so I'm going to change another 50 gallons today.
So I'm thinking it's one of two things. Something toxic entered the water or some type of parasite. About a week ago I added some snails, two pistol shrimp and a goby to the tank. I know, I know... I should have quarantined and if it is a parasite then I paid dearly for my mistake.