Probable cause of fish death:bacterial cross contamination.
Went to LFS, they think I had cross contaminated my QT tank and saltwater tank, probably through buckets/nets/etc. Both my clownfish and del died of similar causes. They had seen another customer a while back with something similar that wiped out a lot of his tank. That guy with the diseased tank paid a University employee to look at it under a microscope and it was a bacterial fungal issue, can't remember which one. But basically the fish get red patches/bloody areas underneath their skin, get respiratory problems and die really quickly. He mentioned that Kanaplex/metroplex combo helped some of the fish in QT recover, but the person who had it lost a bunch of their fish. LFS said it was better to break down the system, throw out live rock/sand, bleach and start over. The LFS said they would help me out get everything going again, but to not to get any fish for a while. Also suggested doing a metal test for my house water.
Other probable cause for Freshwater tank water problem: old pipes
asked my mom if we had old pipes.... Said they were 40 years old lol. Will look into getting the water tested for metals.
Here's the plan: (any suggestions or revisions are welcome)
1) throw out more stuff. "old" sand/live rocks from salt system.
2) break down ALL tanks. and rebleach other tanks.
-*can any of these be bleached and reused: 5 gal buckets, nets, tube siphons, glass pebbles in betta tank? or better to be safe and just throw away?
-*advice on how much bleach to use per gal/5 gal?
3)Rinse bleach and then use vinegar or Prime to wipe down tank after things soak in bleach water for 24hours.
4) rinse excessively and save some tap water to test for metals.
5) Put saltwater shrimp in 10 gal QT. Dose with Kanaplex and Metroplex.
* get non-poly tanks set back up....will be easier than main tank.
6) Test 55 gal to see if I resealed it properly..... If it explodes, convince parents to let me get 75. win-win either way.
7) Contact barton people for nearby red sand.
8) Spend all day trying to Set up canister filter on 55g. Try to figure out how to cycle the tank
9) Get danios and or guppies.
10) ORDER POLYS.