Red Algae aside, this is the best
587531
It's not perfect, but it's hands down the absolute best resource available for Lutherans to read and understand the scriptures, both in their historical and theological contexts.  As a Lutheran pastor, when people ask me what bible to buy, I point them here without a thought.

This is an expensive bible, but it's competitively priced with other actual study bibles, and the information, explanations, and other resources inside of it are worth it.
2882957
I replaced two t-12 bulbs and two metal halide bulbs with this light on a heavily planted discus tank (90 gallon) and everything is growing great.  Algae is growing much less, I can put my canopy back on my tank, and the energy saving is amazing.
1797978
My tank was cloudy with an algae bloom and after 5 days using this product, the water was crystal clear. On day 3 I kept the tank lights off and did a 20% water change. That seemed to really help--I think it gave the UV sterilizer a chance to get ahead of new algae blooming. I've only been using the product for a week so I can't attest to its longevity, but so far it has far surpassed my expectations. The attached photos were taken on consecutive days, with the first being taken as soon as I started the UV sterilizer.
3098928
Seriously, this is a very important product for those of us who have ponds or pools that have algae bloom.
I found out about this years ago and it worked.  The problem is finding the Barley Straw Bales for the ponds.
Not only are they available on Amazon, they are available in a variety of sizes.  I got the smallest one for my little goldfish pond where I don't want to use chemicals.  I ordered the larger one for a swimming pool that has been allowed to "go natural".  The barley straw worked within days in both circumstances.  It is amazing to see this in action.  If you have any green algae problem and don't want to use chemicals ( which can kill the plants you may want ), order this today.
I should mention that in the small pond ( it is really small) the racoons got the bale and took it apart.....the straw still works I just need to remember not to take it out when removing stuff from this particular pond.
2868991
I always want to know about my nutrients, although it did not include the best fo all....fresh water blue green algae from New Earth, have been taking for over 25 yrs.  it is the best of any.
16796
I bought this at my local pet shop. (Sorry Amazon, I didn't see it here first.) It's great.  I was using a scrub brush on a handle, and this is so much better. 55 gallon glass tank, and this is quick and does a perfect job pulling algae off the glass. Super easy.

One thing to note the magnets are pretty strong.  It's not going to hurt your glass or anything, but the North/South poles are very strong. If you hold the handle upside down, the scrubber will flip around backwards in the tank. It's just a little quirk of this thing.

I only wish I'd put my tank further away from the wall to get the back side of it as easy as the front.
3765531
I have a substrate that contain nutrients and some unknown ability to harbor blue-green algae.  (65 gallon tank/fresh).  I have used erythromycin that only eliminates obvious growth of the algae, only to have it return in a week or so, now with a somewhat resistant strain that survived the medication.  I have also used ozone that does destroy this algae so it is not to be seen, but it apparently is still alive in the substrate because the blue-green algae returns.  Other than breaking down the tank and cleaning the substrate, the only recourse I had was to use this product, a chemical.  I still do have blue-green algae, but it's ability to thrive and reproduce has been diminished considerably, to the point where little remains.  This product was introduced 2 months ago and multiple doses were administered.  Time will tell how much of this algae will be eliminated altogether.

pros:  it will control blue-green algae, and perhaps eliminate it, depending on the type of substrate used and items in your tank (driftwood, plants, etc)

con:  don't expect miracles, and the algae might not be eliminated, depending on your situation

I have purchased this more than once, and would recommend it
3393005
I have a 125 Gal. tank.  I was skeptical, but its does a good job. It even got rid of my brown algae. I think its due to the UV light. I couldn't be happier. It is very quiet.  only complaint is the instructions are horribly written.
4300179
I bought my first above ground pool this summer.  I could not get the algae under control.  I'd shock the pool, use chlorine, run the filter but unless that was almost a daily thing the algae would return.  I bought this after reading all the reviews.  It's almost full after using it only several times but it works so well that I rarely have to use it!  I last used it in October.  I wanted to drain the pool because it's now winter here in California but I was never able to do it because the water was just too cold and I'd have to physically get in to open the drain.  Each time I check the pool it's still crystal clear.  I'm sure it's partially due to this product and also partially due to the cold weather we're currently experiencing.

If the algae grows again I know this will work.
3902302
I had been fighting ugly brown Algae in a well established aquarium for over a year. I tried just about everything to no avail. When I was just about to give up someone recommend this product. With nothing to loose I gave it a shot.

Wow what a difference! Not only did the brown Algae clear up within a couple weeks but my other plants exploded with life. So now the brown stuff is gone and my other plants are lush and growing like crazy.

Money well spent!
4933767
If you have cyano, you need to look into the water parameters first before using this product. Otherwise it will be a matter of time before you get round 2 of it.  In my small pond, I believe the organics were accumulating since I probably killed off all the nitrifying bacteria when I cleaned the filter and the colder weather conditions took a while for the bacterium to reproduce.  To solve this problem, I reduced feeding and did massive water change before using this product. This product works quite well. It would be better if they would list the ingredients so I could feel comfortable enough for my reef tank...... Anyways, I think it does contain some antibiotics of some sort.... It has no effect on my plants or green algae but the cyano went from red to black from die offs.  I truly believe that it contains a variation of erythromycin, then this is not a bad price. Erythromycin in the US is VERY expensive and I have no idea why. I will knock one star off unless the manufacturer can say that this product contains NO antibiotics of any sort...
3554175
Excellent price and they cleared the algae better than anything from the big box stores and Amazon had them cheaper!  I dropped two tabs in the tank and within a couple days the algae spots on the sides just wiped away with no scrubbing and within a week the algae collected on the tank ornaments was gone too!!  Worked a lot better than the liquids at the stores.
595989
I bought this product about a month and a half ago, because I live near Houston, Texas, and I could not control algae. Believe me, I tried everything.
I read a lot of reviews and decided I should give this a chance. This thing works like MAGIC! I back washed and brushed the pool, then put this in the skimmer, and I have not had algae since! I am so happy!
Just keep your skimmer basket clean, every few days, if you have a lot of leaves. It is true, chemicals don't have to be added as often. I love it.
4170410
i have tried a dozen varieties of algae control products,and this one actually works.it keeps my pond crystal clear.the summer heat in Texas really makes the algae build up quickly,and this product does the job.
3461225
Everyone owning a pool should be using this.

I wish any area pool store sold this stuff.

This essentially eliminates the need for algecides and cuts my chlorine usage by 50% - 75% each year.

It kills what Algae needs to live on, what a great way to manage any kind of Algae !

I love this stuff !  Told all my friends.
4397988
It took me a while to review this product, mostly due to the severe flooding we had in the Midwest. That said, when things finally started to settle down, I had the biggest algae bloom possible in my pond. The entire thing was covered with green slime so a perfect test bed for this product.

My pond is not very large, around 400 square feet, and maybe 4-5 feet deep at its middle. It has a water fall, some lilies, cat tails and some Iris.

When applying a product like this, I want to ensure that it does not kill the local fauna, and I can tell you it does not. By accident I slipped and pored much more in the pond then intended (maybe half a gallon or so).

The results were that the waterfall foamed up, and I was sure that the lilies would be toast, however, after a few weeks, I can see the bottom of the pond again, the water is clear, the algae died back and got removed through the skimmer and above all, all the lilies, iris and cat tails are unaffected. The foam started diminishing after a few days.

I will for sure keep using this product.
809736
I want to say WOW! I had lots of black beard algae and spent years in fighting with it, just 2 weeks for excel and there is not algae at all. his thing certainly deserves a monument in my aquarium :))))