It just took me longer to put the hose away than to spray the entire front.

Well, not quite, but it felt that way. I finished 5,000 square feet in about 20 minutes, and I was being extremely careful, testing the solution as I went, and being certain to completely spray all the grass to run-off.

Overall Grade: A+. Would I recommend: Absolutely.

Construction on the sprayer is solid, and I don't foresee any major breakage issues under normal usage. The handle is extremely comfortable, and the on/off spray switch is well-placed for your thumb and easy to use. Cleanup was a snap.

I mixed 7.5 ounces of ferrous sulfate and 4.5 ounces of ammonium sulfate in the very large sprayer body. On the dry setting, it acts like a Miracle Gro feeder, adding water to dissolve the granules. I'm certain that at times my solution was too dilute, but I'll learn that. Or I'll dissolve it outside the sprayer, pour it in, and use the wet settings instead--which I'm about to try in the back.

There's a single dry setting on the sprayer, which seems to dissolve the above mix in about 30 gallons, give or take, yielding a 0.2% solution. The only minor issue is that the straw is removed for dry settings, so be careful not to lose it. You'll need it for wet spraying.

Assuming 8 ounces of ferrous sulfate in 1 quart fully dissolved (plus enough ammonium sulfate to fully dissolve as it doesn't dissolve quite as well), the wet settings will all give a 2% solution.

Dilution, using extra water and wet settings down to 0.3% is easily possible. Further dilution can be done but will require some math. Less dilution is also possible; use a higher setting with a more concentrated solution, but again will require some math.

The sprayer has three different built-in nozzles. The bullet nozzle isn't a power washer and isn't intended to be one, but enabled me to spray about 20' up into the trees to give those some iron.

I didn't care for the fan sprayer on the lawn, but discovered that it's great for shrubs and smaller plants.

The gentle rain nozzle worked best on the lawn, giving a wide distribution pattern and finer spray.

Thanks, Morph!

I'm gonna try out some bonide rts iron today. If I like the results, i'll be looking for a hose method of applying iron on the cheap. I like the dry capability of the sprayer you reviewed.

Thanks again!

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Wet setting review: It's nicer than the dry setting, which I hardly thought possible.

I started at the 3 gallon setting, which laid down the solution way too fast. 15 for iron is just about right, with 8 ounces ferrous sulfate dissolved in 1 quart of water, yielding about 4 oz ferrous sulfate per thousand, at least at the rate I walk.

We may get rain today so I'm not sure I'll have time to evaluate the effectiveness at that dilution. The other option would be to cut back water pressure and move faster.

24 Hours: I don't seem to have missed, and coverage was no issue at all. Even when I thought the dry dilution was a little short, the grass responded perfectly. The manual specifically states that the dry setting is good until the solution color lightens, which I can now report as accurate.

The 2,500 K or so I sprayed wet is also perfect, but I expected no issues there.

This first time, I didn't use a surfactant. If I ended up severely over-applying, I didn't want to risk a burn as our temperatures may hit 87 today. Next time, I will.

Morpheus, is it the same sprayer make by hudson?

Click here for more information

I bought one from lowes long time ago. Did not have a chance to use it.
I buy it intend to study how the solution draw from the tank. I want to DIY
some chemical injection device for my swimming pool. I end up buying a
used chemical injection pump from ebay.

From the amazon review, lots of people have problem with that sprayer,
it does not draw solutions from the tank at all. I just try mine, it seems
draw solution fine. I am glad mine is not defective.

BTW, what is the story behind your new avatar? You old avatar is,
hmm, much cooler.

Not the same--or so it seems. The Chapin is well-constructed.

The avatar is Mitch, my Zombatar from Plants vs. Zombies. His hobbies include groaning, staggering, and eating brains. I'll probably change it shortly; C&C can't stand the thing.

MorpheusPA wrote:Not the same--or so it seems. The Chapin is well-constructed.

The avatar is Mitch, my Zombatar from Plants vs. Zombies. His hobbies include groaning, staggering, and eating brains. I'll probably change it shortly; C&C can't stand the thing.

From the picture it looks exactly the same. Does the Chapin can go up to 4 tps for wet spray and has
2 dry spray setting?

Nope. There's 1 dry spray setting, about 0.2% solution.

There are four wet-spray that are gallon-measured, 3, 6, 15, and 21. So you do have to pre-mix solutions, but that's no big deal (the directions are simple and very well-written on how to do that).

How big is your solution tank? It looks like 40 oz. If mixed with 3 gallon of water,
that makes it 13 oz per gallon, 78 tsp per gallon. It is much higher than my hudson
sprayer, which only do 4 tsp per gallon. I am just wondering 4sp per gallon seems
way too low for applying iron sulfate.

May be I should get the Chapin 6005 myself. It is a lot of trouble to clean
my 4 Gallon back pack sprayer after each usage. I also need to wear a big
plastic bag to avoid iron stain on my cloth. The iron stain is obvious and hard
to get rid of.

So far I have a very good success rate of copying your solutions. More stuff
to buy.

40 oz, but you get far more than 3 gallons out of that on the dry setting (on the wet one, it's all stabilized to a 2% solution at the recommended levels, but further dilution is certainly possible). However, since you can put about 2 pounds of ferrous sulfate in there, that's a heck of a lot of solution to make.

Four tsp per gallon is a bit low for iron, yes--that's only 0.67 ounces per gallon, or a half-percent solution.

Update:

After having a few clogging issues with kelp and humates, which are a bit thick, I took an old Ortho sprayer's filter and placed it at the bottom of the tube, and trimmed the tube to account for the extra length. That took care of the minor clogging issue perfectly, and the tube is exactly the same size and accepted the filter with no issues.

Something like that would have been a good thing to have on the basic sprayer, so I'll downgrade the score to an A from an A+. It's minor, but should have been done at the engineering phase.

Hey Morph I know this thread is a tad old but being that you have this sprayer you can answer my questions. I am getting ready to spray some Ortho CCO or Ortho Poison Ivy Killer. I have 7500 sqft to spray. If I have done my math correctly, I need 37.5 oz of CCO or the PI Killer to do the 7500 sqft. I am confused as to what setting to use to get the 1oz/per 200sqft that the CCo says to use.

Thanks!

How fast are you moving? I think I'd test this, starting with the sprayer on 15, in the driveway using water until you're sure. My bet is #15, but if you go really fast, #6 might be better. Really slow compared to me, #21.

Thanks for the reply..I'll do some testing and see what setting suits me