not sure!!
i know thats the worst reply possible but i need to get a new testing kit.
I had recently obtained a whole outfit from a friend that included about 36 fish. I had previously owned the very same pleco, 1 albino catfish and a cory. Then my friend said he was getting rid of his set-up and did i want the fish and media so i said yes please (he was going to honestly flush them down the toilet. Nearly £200's worth!!) I had a new tank I wanted to set up as I'd just moved house so I had to do an emergency transfer using the bulk of his aquarium water plus about 50% water change. It has now since had the tap water treatment on water changes since the first change. There have been a few deaths but all seems ok now. It seems to have stabillised quite well. I do have an array of fish tho!! Is it safe to run 2 filters? Seems a daft question i know but one i have never seen or heard asked??