toilet
A little while ago I started having trouble with my toilet when flushing. It's flushing too much water, leaving little left in the bowl. It also makes loud noises at the end of the flush.
There's still some water left in the tank, so when I flush it very carefully a second time I can get it to fill up just enough.
I'm in an apartment on the first floor (second if you're from the US), in case that matters.
What could be causing this?
Here's a picture of the tank:
That's a fairly popular fill valve. To open it:
The cap will then lift off and you can inspect and clean any parts. Before reinstalling the cap, move any small parts to a safe location, get a small cup to place over the top of the valve, and turn on the water supply. This will jet water straight up from the top of the valve and clear out any debris.
Reinstalling the cap is the reverse of the above procedure. Put the parts back, position the cap back on top, lift the float, press down on the cap, and twist.
Note that if cleaning it doesn't work, it's fairly simple to replace this fill valve.
Usually you can adjust the float so that it shuts off at a lower water level. Also, sometimes the float is just getting stuck (and it needs to be cleaned).
Edit: If adjustment or cleaning does not work, then you need to replace the fill valve (it's not an expensive part).
Edit2: Reiterating Ed Beal's comment- you may want to start with turning off the water to the toilet and flushing the water out. Then you can inspect or replace the fill valve. A fill valve kit can currently be had for under $10.
Best Answer
It looks like you are missing your fill hose. There should be a hose connecting the outlet at the top of your fill valve assembly running into your overflow tube: