K, several things here.
First, Angels and goldfish shouldn't be in the same tank, different tempterature requirements I believe.
The cloudiniess you saw was a bacterial bloom most likely, caused by high ammonia counts - which were probably induced by all the goldfish, these are extremely messy fish. The othe fish probably dies from being in a tank in the beginning of its cycle, most fish are not well suited to cycle a tank.
I'm dying to figure out how you got plastic to rust, because, well, it can't.
If you are speaking of a reverse osmosis filter, then yes, you need to go back and put in all the "goodies" the plants need to grow. Wild discus are soft water. Most LFS discus are not - ask your shop what water parameters they keep the fish in.
You can try a SMALL bag (fine mesh bag) of peat moss in your filter to soften water.
Bacteria resides on surfaces, not in the water column. If your tank is cycled, keep all of the filter media. Put the filter media in the old tankw ater while you switch stuff around. Use it to start the tank with.
Another trick - Keep some of the old gravel, put it in some panty hose. Keep the panty hose bag sitting in your old tank water while you set up new - then hang it in the tank for a couple of days.
PS Discus are notoriously sensitive to water quality, much more so than many common fish - if you are losing angels, you'll want to hold off... they need a well established tank with pretty pristine water conditions to flourish.
First, Angels and goldfish shouldn't be in the same tank, different tempterature requirements I believe.
The cloudiniess you saw was a bacterial bloom most likely, caused by high ammonia counts - which were probably induced by all the goldfish, these are extremely messy fish. The othe fish probably dies from being in a tank in the beginning of its cycle, most fish are not well suited to cycle a tank.
I'm dying to figure out how you got plastic to rust, because, well, it can't.
If you are speaking of a reverse osmosis filter, then yes, you need to go back and put in all the "goodies" the plants need to grow. Wild discus are soft water. Most LFS discus are not - ask your shop what water parameters they keep the fish in.
You can try a SMALL bag (fine mesh bag) of peat moss in your filter to soften water.
Bacteria resides on surfaces, not in the water column. If your tank is cycled, keep all of the filter media. Put the filter media in the old tankw ater while you switch stuff around. Use it to start the tank with.
Another trick - Keep some of the old gravel, put it in some panty hose. Keep the panty hose bag sitting in your old tank water while you set up new - then hang it in the tank for a couple of days.
PS Discus are notoriously sensitive to water quality, much more so than many common fish - if you are losing angels, you'll want to hold off... they need a well established tank with pretty pristine water conditions to flourish.
