Hey all. I am new here (first post!) so I will first say Hello.
Alright, down to business. I have a wonderful blue betta (cleverly named Dr. Fish, haha) but I have a concern about something that happens after every water change.
I change the water every other Wednesday. After every water change, there is this 'film' at the surface of the water. Think of it like this: if I poke my finger in and pull it out, the area where my finger used to be is clear (normal) ...but the rest of the top of the water is murky. The water itself seems very clean when looking from the side of the tank... just not the surface.
Also, when the water is like this, any food I put in spreads around VERY quickly, like I could put in a small amount that should sit in a 2 x 2 cm spot, but it disperses and covers more than half the tank in a second. Dr. Fish doesn't eat as much when it is like this... like he can't see (or smell?) his food.
As the time passes (now it is the Thursday after, so 8 days after the change), that film starts to go away... his food stays grouped together, he sees it right away, and eats it all up immediately.
Things that may be helpful to know:
- I use tap water
- I treat it with water conditioner (NutraFin Aqua Plus), leaving the new treated water in a sealed container for several hours (or overnight) before changing it, just to make sure it reaches room temperature
- I have a 2.5 gallon tank with 2 fake plants, an arch ornament, and plenty of gravel (the gravel is absolutely clean)
- The rest of the tank looks super clean after the change. It's just the surface that is an issue. After removing all the old water, I rinse the tank out very well (no soap, of course) and scrub all the gunk off the sides.
- I have a simple rectangular glass tank with no filter
- I do complete
water changes every other week
Please help Dr. Fish!