bongwaternanotank

I have a Top Fin sponge filter in my tank and it's making a loud humming noise. It started after only a few days of having it. I'm using my sponge filter along with a 5-15 gallon air pump for a 10 gallon tank. If I lift the filter off the tank floor a few inches then the sound will stop, but it starts again the closer it gets to being set back down. Anyone familiar with this sort of sound from a sponge filter?

Thank you so much!

Yes, I use a water conditioner with water changes. Thank you for the advice!

Thank you so much! That's good information. I'll definitely get an Amonia test kit and look into the API Stress Coat.

I have a planted community tank where everything, but my Corydoras are thriving. My Corys have greatly lost their color and have a white hue. It looks like layers of their skin is flaking off. Whatever this is seems to be slowly progressing from Cory to Cory and each Cory worsens daily. I treated my tank for Ich about a month and a half ago. I had to dose for close to a month and did multiple water changes. It was towards the end of the treatment that I began noticing the discoloration and for the past couple of weeks it has been worsening. I've been treating with API Melafix for almost a week now with no signs of improvement. This Cory in the next picture has (what I assume is the same thing) by far worst and unique from what I've seen on any of my other Corys. pH 6.8 Nitrates 20 Hardness 150 Nitrites 0 KH/Buffer 40 Temperature 78 My Tetra test strips don't show for Amonia.