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yea its me again...and i am in trouble...ok so the other day my heater broke in the middle of the night and i woke up to a dead oscar, and the other oscar looking like hes on his way out.. the temp dropped big time, and i also developed, what i think is a bacterial bloom(white cloudy water)..so i went out and bought a new heater and installed it right away, and did a 50% water change...the heater didnt have the temp numbers on the dial so i just guestimated it and when i woke up the next morning...the bacterial bloom was still there, the oscar was swimming a bit, but still far from 100%, and my small pike cichlid and tiger shovelnose were swimming around a lot(they dont usually swim much at all)...the temp was a bit warm(82ish)...so i turned the heater down a bit, and i also added more airation..currently...the temp is now stable at 77ish..the oscar is in the same unstable condition, and the pike and catfish are still swimming a lot and hanging out a lot near the surface..and if that all wasnt bad enough...i have more bad news!! ive seen the pike rub up against the gravel..i know this is a symptom of ich, so i checked him over for the little white spots...i found 3 tiny little spots on his side fins...but it doens really look like a case of ich, just cause there are only three, and they are veeeery small(but i could be mistaken)...
ughhhh this has been the worst fish week for me ever!!!
what do u recommend i do...about EVERYTHING?

i will most likely have a ton of follow up ?s for u, and i appologize for being such a pain, i just dont want to lose these fish

hope to hear from u soon...thanks soooo much in advance!
-sean

raise the temperature to 81 degrees F., for a couple weeks anyway

increase the oxygen levels in the tank...
add an air pump,
a second filter,
and/or
lower the water level a few inches
so that the returning water splashes the surface a little

change 1/2 the water every day for a few days
(always use a water conditioner when adding new water)

be careful to unplug the heater
before draining the tank
and of course plug it back in
after the tank is filled

put in 2 teaspoons of salt
per 1 gallon of aquarium water

this is the most salt you can ever put in freshwater
(it's about 2.5 pounds per 75 gallons)

if you use more than 2 teaspoons of salt per gallon of water,
the salt will make the fish sick

IMPORTANT:
so when you change half the water,
you put only half the salt

salt only leaves the aquarium when you drain the water...
don't have a high salt level, then let the water evaporate,
because the water will get too salty

you only need salt
when the fish are sick,
if they are 100% healthy
you do not need any salt for freshwater fish

well the other oscar sadly passed this morning..but i did what u said and added more airation and did a 50% water change and added salt and turned up the temp...the water is now crystal clear...the other fish are doing good now...thank u soooooo much, i really appreciate the help....do u still think i should continue with daily water changes?..or can i go back to the bi-weeklys.
thanks again
-sean

when you have very large fish
you should change water as often as possible