Nice looking pond landscape. Your ecosystem is out of balance though.
Your water is green.

3. Consider abandoning the unsightly bottom pump and exposed hose and
going with a Savio skimmer and possibly replacing your waterfall
biofilter to handle more activity.
Paul

Wait a minute, these two don't make sense, if his water was truly green one
wouldn't be able to see the "unsightly bottom pump and exposed hose" so I
took a second look. Nope, not green, looked great for early spring, in
fact. A few lilies will cover over the hose and pump in no time. ~ jan

~Power to the Porg, Flow On!~