Hello everyone, I have been in the saltwater hobby for several years, I have a 75 gallon tank which has been my main aquarium since 2014. Shortly after I managed to establish a mature system with several fish including angels, butterflies, clownfish and some gobies. Unfortunately the tank trashed one night and lost all the fish, some on the spot and others as the days went by. It was disastrous and I retired for a while, but since then I have not had an established tank like that, so I got some fish over time in small tanks, I was able to collect them in 2019 and everything started again, time after such a mistake silly as it was a movement in the DSB resulted in an ammonia spike that killed all the fish I had in mid 2020. I have not had marine fish since then, I'm starting engines again, I have two 10 and 20 gallon QT tanks and my main 75 gallon. Fortunately all my rock has been in operation since 2013, 8 years working. I attach photographs of my tank in April 2019 and the most recent one taken this morning, it's a new beginning for me, if everything goes well I will start planning a larger system, but first I want to be successful here, I'm not a beginner aquarist, I guess I've just been unlucky, so we've started over.