Hopefully they're alright for the night as it's pretty late for me to be doing a water change. I'm going to go out in the morning and I think i'm just going to invest in a test kit. Was hoping I could avoid it as they can be pretty costly but I think I better do it. I'm hoping they're just adjusting though. They seem to be getting a little better possibly.
Before I bought them today I bought a bunch of new silk plants (I a couple of plastic ones before as that's all I could afford at the time.) and a few other decorations that have areas to hide in. I set it all up in the tank before putting them in!
Here's a picture of the tank so far.