Filter disaster - sulfur smell?
I got a phone call from my dad at around noon today. I had been at work and school all morning, and the night before stayed at a friends house, so I hadn't been home since the night before. I had noticed the water was a little warm when I left, so I turned the heaters down, thinking I had bumped the dial somehow. At noon, the water was so cloudy he couldn't see into the tank, and he said the water felt hot (he didn't look at the temperature). He spent the next 3 hours (I wouldn't be done with work/school untill 9 this evening) taking the surviving fish and putting them in buckets and doing a 75% water change. He couldn't catch a few of the fish, so they stayed in the big tank.
My aquarium is 55 gallons by the way, and is planted.
Anyway, he said when he turned the filter back on the water got hot again. So it wasn't a heater malfunction as I thought. I did another 75% water change because the water was still cloudy when I got home tonight. Ammonia, nitrite and nitrates are all 0 though, before the 75% water change.
3 of my yoyo loaches (of 6) hung on. But all 3 were floating when I got home. They're panting, upside down, when you touch them they swim quickly but end up back near the surface panting again. I had 5 congo tetras, all died except for the 1 female. She's swimming fine and seems energetic, but she can't stay down. I had a few gold barbs, only one lived.
Anyway, when I did the 75% water change this evening, I noticed the water had a faint sulfur smell. Could anything with the filter cause this? And why would the water be so cloudy with no nitrates, nitrites or ammonia? The filter is a Penn Plax Cascade 1000 Canister Filter.
I don't know what to do. Obviously the filter isn't running, and won't be for a few days untill I can get a new one. I have to find the money somewhere. I just bought the canister a few months ago, and that was a huge purchase for me. I'm in shock. I've never had an issue like this in 4 years of keeping fish. All of my favorite fish died. The only fish that are left are the hardiest fish who I've had forever. I have a weather loach who lived, and a new albino longfin bushynose pleco who lived and seem to be doing extremely well, so that's good news. I guess I don't have anything else to say about it. Any advice or ideas would be appreciated.