FLESHY;4751320; said:Most of your bacteria is in your filtration, rocks, and sand.
Large h2o changes tend to create big swings in h2o parameters that can be harmful to your inhabitants.
However, I look at it this way.
You are overloaded on chemicals that will eventually kill your animals. You need to get those levels down pronto. You are also replacing your substrate, taking out a lot of your bacteria the way it is. I would say that with these circumstances a 50% h2o change would be okay. None of your animals are going to complain about h2o quality getting better at this point.,
Like to see some pictures of the tank eventually, glad that we sort of have this on the right track now. (Hopefully.)
Look out for your new anemone's. They might be aptasia which will spread like crazy and can sting other inhabitants.
Not cool.![]()
+1 This was my main concern, changing the parameters too much and removing too much bacteria.
I suppose you could do what you are going to do, but only fill the tank to 3/4ths after putting in the new rock and sand. Then wait a few days and fill it the rest of the way. I don't know how much that will really help, but it may take some of the strain off you livestock.