Water Gardening: Crystal Lagoon question, 1 by randbponder

randbponder wrote:
kateliza_id
A sudden loss of fish, in your case is possible, by the water getting too warm, without airation (pump) not running. That would be simplest cause. otherwise amonia, or nitrites buildup got too high. Or it could be any combination of any of those factors.
You do need to keep a pump running, 24-7. It should be a high enough volume, to change all the water in the pond through the filter at once every 2 hours. Also for your benifit, you should get an inexpencive test kit. and keep track of any changes in the quality of the water. Your local pet store where they carry fish should have one. They have directions as how to perform the tests. and usually a sugestion as what to do for whatever is out of balance.
I would also folow jeri11's advise. about a UV light. If it is the right size for the pond, it will kill the algae bloom so your filter will take care of it.
However If any lawn chemicals were to leach into the pond, none of the above would help.
Be very careful in that respect. By makeing sure no water runoff can get in your pond.
You can get a ton of information , ( sorry I'm having a brain fart here) its either POND DOC, or KOI VET just goggle one of them in. They will list most of the problems, and give some of the solutions. Good luck and happy ponding. I will second jeri11. BEEN THERE DONE THAT.
Hope my rambling offered some help. Russ