I am not sure what sheet algae is, is it the same as string algae? I have had string algae several times over the years. I took apart my entire pond and scrubbed every flat surface. Then reassembled and kept debrie from falling into it as light as possible with daily cleanings with a net. Only takes a minutes when I feed my fish and helps a great deal. My pond is under a wheeping cherry and gets much leaves and blooming petal fall. Last fall I covered it with a net as soon as leaves began to fall, and kept it covered with the net all winter as I get a great deal of winter fall/blow into it. The net reduced it by ten fold...I will never enter another fall/winter without netting it again. Is a net an option? Once you rid the pond of the algae, use barley straw, it comes in either sheets you can slide under plants or rocks or in pellet form. I liked the pellet form best. If it is string algae, hand removel is about the only way I know of to remove it or so I have been told. And it will continue to regrow as fast as you remove it if you do not find and fix the source. I use the barley and a NET during times of falling leaves and I have not had string algae in about five years now...knock on wood..there is not much worse as a pond owner...good luck!

I have five big regular frogs, 1 medium, and 1 small. They were up almost all winter until February when it was very cold, but we also had moths and worms during the warm winter. They went in the pond all of February and the first week in March but are all up now. No losses. The earthworms are out in force tonight with all the rain and today it was 75 degrees, but tomorrow is supposed to be 40, and then will warm back up. I only had a skim of ice for a few days this winter in the large pond and had 10" of ice on the small pond on the north side of the house when the pump and thermopond failed, but after I opened up a hole and reached down I felt a live frog swim from my hand. I saw that one last week alive and well. Knock on wood I've not lost a frog yet due to winter, but I think a heron got one of my original 6 frogs. The biggest frog is 8 or more inches now - a real monster. I'm sorry you lost your frogs - I know I would be sad if that happened. You get attached after having them around for years. CT

There should have been a good water change and a cleaning of the mulm from the pond bottom before medicating. Sea salt and water conditioner salt which has no additives can be used. To medicate the amount would be 2#-3# /100 gallons of pond water until you see improvement. The salt must be dissolved before adding. It might be best to issolate the sick fish to a small tank to treat. The frogs will move out if they don't like the salt. Good luck.

You won't need rocks actually IN the pond for the toads. They're air breathers, and they will prefer to sit in a sheltered, cool area outside the pond during the day. When you initially fill your pond, go ahead and use tap water. The chlorine will evaporate before the toads and frogs find the new pond. But when you need to "top off" the pond, that is add water after some of it has evaporated, you can "age" the water by putting water in a bucket and allowing it to sit out for 24 hours or so before adding it to the pond. That allows time for the chlorine to evaporate. Yes, you are correct. A liner is a strip of (usually) black rubber, very flexible, and can be shaped to the size you want. Mosquito dunks are donut shaped objects that you place in the water to prevent mosquito larvae from hatching. You can find them at any garden center, but if you have a small pump in your pond to keep the water moving, you won't need them. Mosquitos cannot lay their eggs on water that has a current. If you can get at least two feet wide and 12 inches deep on your pond, I think you'll be okay. Remember, the smaller you go, the bigger the water loss due to evaporation, and that will make it harder to maintain a healthy balance for the tads. You will get algae in the pond. Tadpoles eat algae, so if there is none, you can buy algae wafers at pet stores to feed the little guys.