What has algae done to summit lake

 After an algal bloom we recommend that all household plumbing be purged prior to resuming water usage.

Explanation: What to Do During an Algal  

Do not drink the lake water or use the lake water for household use until laboratory tests show the water is safe. Even homes with disinfection and treatment systems will want to take precautions because water treatment systems do not remove or deactivate algae .  

Keep pets and livestock away from areas where algae blooms are present.

Avoid contact with water containing algae. Do not swim or water ski.  

When fishing, use only catch-and-release of any fish caught during an algae bloom.  

Do not eat fish that come from the lake during an algae bloom.

Avoid areas of when boating.

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.