NEED HELP STAT!

So I have added a about 7 small mini Acropora colonies (more like large frags about 1.5 inches x 1.5 inches into my aquarium since the water parameters seemed stable enough and over the past three weeks my water parameters have started to take a dive. I've also noticed that a few of the Acropora colonies seem to be suffering from burned tips. No I have a very minimum bioload as there are no fish in my aquarium and I feed only twice a week. But I am curious what could be causing the drop in pH, ...

So the last fish inhabitant of my aquarium is about to pass on and after taking a full battery of water parameter test and going with everyone's suggestions on what I thought was a Bristle Worm problem I think the following photographs below would most likely point to some type of water born disease except I'm not expert on marine disease so if you have any thoughts than please chime in. It doesn't seem to affect any of the inverts, clams or corals within the aquarium. Your assistance in advance ...

So I started out with an aquarium that was loaded with fish but I noticed a few started to die off for no apparent reason. All of my Green Chromis have disappeared. I snail gone and I am only left with 2 Purple Firefish, 1 Clownfish a two Zebra hermit Crabs, 1 Sand Sifting Cucumber and thankfully all 4 of my shrimp. Will I took a look at the tank in the evening and noticed these little guys... Bristle Worms. One that was exceeding 3 inches long. Top that with an algae bloom that made my beautiful ...

So unfortunately I have been in the in the hospital recovering from emergency surgery to save my life from a burst appendix. So I wasn't able to tend to my aquarium and my wife told me my fish don't look so well and that my snails are making runs out of the tank. So without any further testing I am assuming that nitrate/nitrite levels may be higher than expected. I have a my Fluval G3 Canister filter running for approximately 3 weeks now with just the stock Activated Charcoal filter and I never ...