Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants chemicals/algae/trout

i have a 50x100 approx. pond that jumps quickly to 15-17' deep. pond was excavated in aug. 06 so it's new. i' ve read threads and searched till my eyes hurt and i think i've got FA type of algae... it's stringy and covers the brush and flows like a flag under the surface. i'm in mid michigan and i assume this stuff never dies as it's there thick this spring just like the last time i seen it before freeze up... i do run an aerator/diffuser in the 12' range. i'd like to get rid of some of the agae and thought that cutrine sounded good from my readings but i have recently put trout in the pond and i know they are very sensitive to ANYTHING... so does anyone know if cutrine is safe to use in a trout pond? thanks. matt.

Welcome to the forum, sadworld.

Is the pond new to you this year, or have you had it since 2006? I ask because FA frequently peaks in the Spring, dying back noticeably in warmer water during the Summer. If you haven't seen the pond later in the year, you might have less FA then and find it less objectionable.

Chemical control info can be found in the Archive FA Thread. For Cutrine specifically, see the link in the fourth post. Why don't you check that out and then post any advanced questions it poises. We have some good people here very knowledgeable wrt trout and aquatic herbicides (I am not one, wrt either).

i have seen the ponds excavation and have lived here ever since.... the algae just kinda formed throughout last year and never went away apparently. it seems the cutrine might not be what i'm looking for as it's a possible trout killer. i'm mostly interested in what people with trout in their ponds do for algae control. thanks. matt.

Sadworld,

Are you sure you pond is 15 to 17 feet deep at 100 by 50 feet? My trout ponds drop almost straight down and at about 90 by 40 feet and they are only about 9 feet deep. Have you actually measured the depth?

This mostly drained pond is only 9 feet deep. Looks much deeper doesn't it?



BTW an easy way to measure the depth of your pond is with a slip bobber rig. Put enought split shot on the end of your line that will get it down fast but not enough to sink the float. Keep adjusting the slip stop knot until your bobber (float) sets on its side. Then measure from the end of the line to the slip stop knot. What's nice is you can cast this anywhere in your pond to find different depths.

yes, the pond slopes to the middle then a trench was dug right in the middle. it drops STRAIGHT down to that depth.... looked like a little canyon before it filled with water! only a small area is that deep, the canyon slopes up to the other end....