EMERGENCY Co2 poisoning!
Hello I woke up this morning to notice fish floating at the surface. I have a DIY co2 unit and forgot to shut it off last night. my setup is a 20 gal dirt tank with substrate on top. I do not have any tests kits to see what the PH is. My fish are Keyhole cichlid, Kribensis, Rubber nose pleco and 2 zebra loaches. there are no casualties but I immediately started aerating the water and i grabbed some of the fish that were in the worst state and moved them back and forth in my hand... seemed to help bring them up a bit but not much. my rubbernose pleco was upside down and his pectoral fins are red. At this moment they seem to be breathing better and looking a little more alert. What should I do this moment? Would a water change be too much for them? Again i have no test kits.... I KNOW right. please and thank you i really love these fish.