Summer is a funny time for ponds. It is when they look their absolute best and when they are working the hardest to stay that way. The same heat that makes your backyard nice is the heat that drops the oxygen, evaporates your water, and feeds algae like crazy. Come August, my phone starts ringing with the same handful of problems, and most of them were preventable.
Here is what I tell people to stay ahead of it.
Keep the Oxygen Up
Warm water holds less oxygen, and your fish need more of it when it is hot out. That is a bad combination. Run your waterfall or an aerator, especially overnight when the oxygen dips lowest. If you ever walk out early in the morning and see your fish gulping at the surface, that is them telling you the oxygen is low. Do not ignore it.
Top the Water Off
You would be surprised how much a pond loses to evaporation in a hot stretch. Keep it topped up. And if you are filling from the tap, add dechlorinator when you do, or you are stressing the fish and killing off the good bacteria you want in there.
Do Not Chase Algae with Chemicals
Heat plus long days equals algae, every time. I know the temptation is to grab a bottle and nuke it. Do not. That just kicks off the green, clear, green cycle and you will be fighting it all summer. The boring stuff wins here: solid filtration, not overfeeding, keeping the leaves and junk out, and letting your plants do their job soaking up nutrients and throwing some shade.
Go Easy on the Food
Your fish are hungry and active in summer, so it is easy to overfeed. Whatever they do not eat breaks down fast in warm water and feeds the exact algae you are trying to get rid of. Feed what they can finish in a few minutes and no more.
None of this is complicated, it just has to actually get done. If your pond is fighting green water, running warm, or the equipment is straining to keep up, do not wait until it turns into a fish problem. I keep ponds across Chester County and Southeastern PA healthy all season, and I would much rather get ahead of it than bail you out later. Request a quote and I will get yours sorted.