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Is the filter compromised? Or just white? I'm trying to figure out how you did this? Do you add directly to a high flow area slowly, or did you dump it in the sump?Had it soaking for a couple days after the vinegar, no effect.
Just curious...have some in a filter sponge, vinegar didn't touch it.
How can I dissolve?
This is a red sea tank, hence the sponge to protect the return pump.
Which red sea tank model?Most people don't use sponges to "protect the return pump" in their standard setups. Is there something in particular with the Red Sea system that requires the pump to have protection? I see the sponge as a great place for detritus and other junk to collect and possibly contribute to a nitrate issue for your tank. Do you really need to sponge?
Which red sea tank model?
Yes, They were the mechanical filtration for the S Series.You'll have to ask the OP.
I see you have an S-400, does it have a sponge too? Is there any real purpose for it?
Do you have to use the sponges?have some in a filter sponge, vinegar didn't touch it.
How can I dissolve?
I had a dosing cup that was crusted with precipitate and wouldn't come off easy. I started dosing Magnesium with the same cup and all the precipitate came off. That's an expensive cleaning agent though.
Which red sea tank model?
Yes, vinegar is weak so 100% is the way, or diluted muriatic acid, which is much faster.
I used to run one of them. So filter sock is out.An old RSM250