Dr.Tim’s Aquatics Freshwater Clear-UP Natural Water Clarifier – for Fish Tanks, Aquariums, Water Filtering, Disease Treatment – Eco-Friendly Solution to Clear Waters – 8 Oz.

It worked for me but took 15 days to cycle, from what I've read a cycle without using Dr.Tims can take 30 days or more. Maybe it would of been faster if I didn't use Fluval shrimp and plant substrate because it lowers the PH and I had to constantly be checking the PH and doing small water changes to get the PH to 7 or more. I didn't know anything coming in but I did research and this will work but there are rules. 1.Ph cannot go below 7 if it does the cycle will stall so you can get it kickstarted again by doing partial water changes. 2. Do not let your ammonia and Nitrite go over 5ppm or that can kill some of the good bacteria and stall the cycle, you can correct this by doing partial water change. 3. Please buy a api master kit or something like it because they are more accurate then strips and please follow directions of each test bottle for accurate results, if it says shake the bottle for 1 minute then do it, shake for 30 seconds do it. 2. Shake the bottle well of Dr.Tims Bacteria, this is a must. 3. Do not gravel vac or disturb the substrate. Do not clean the filters, do not change the filters. This is for freshwater I didn't do a saltwater tank but if you have Filter socks or UV lighting they must be removed for the 1st 48 hrs when you add dr.tims bacteria. Filter socks is not the average filter so don't remove your filter thinking it's a filter sock, look it up to see the difference. 4.Use a water conditioner that does not remove ammonia.5.if you are doing a substrate free tank this will take your tank longer to cycle because the only thing your benifical bacteria will have to grow on is your filter and maybe your tank walls and decor.6. You need a source of ammonia to feed the bacteria which Dr.Tim makes as well, do not add ammonia if you have fish, these are instructions for a fishless cycle, if you have fish the fish will produce ammonia for you when they use the restroom and the uneaten food will be producing ammonia for you.7.use a heater and crank it to 82 degrees again without fish in the tank. This will help bacteria grow faster, kind of like how hot tubs are breeding grounds for bacteria. 8. Don't add ammonia until you get a reading of 2 ppm just add 2 ppm ammonia by following directions of the Dr.Tims bottle which the newer bottles say 4 drops per gallon will equal 2ppm ammonia so if you do the 4 drops per gallon and you get your test and it says 1ppm on the test then that is okay don't add more ammonia to get it to 2ppm on the test, the reason it's not showing 2ppm is because the good bacteria is already working and doing it's job. This only applies to the 1st application. The equation is already done for you if you buy Dr.Tims Ammonia when doing a fishless Cycle 4 drops per gallon is 2ppm ammonia no matter if the test says 1ppm on first dose. Dr.Tim has a recipe for when you should check the ammonia and has a youtube explaining the do's and do nots, so that really helped me, check it out. 9. If you are not using Dr.Tims Ammonia then it will be very hard to figure out what 2ppm ammonia is and if you buy ammonia from the store you have to make sure the ingredient is only ammonia and possible water but if it says any other ingredient then no don't but it because it will contaminate your tank with soaps, perfumes, and other stuff. 10. If either or both ammonia and Nitrite are above 1ppm do not add ammonia. Look up Dr.Tims fishless cycle recipe and you will be shown when to check ammonia and other directions that way you are not wasting time and test liquid. Good luck, Dr. Tim can also be asked questions on YouTube and on his site, but it takes a while for an answer on YouTube try his email maybe it will be faster that way. Good luck

First of all, the product itself is awesome if you buy it directly from Dr. Tim who knows how to store his products properly. I bought one from Amazon and it didn't work. So I went to Dr. Tim's website and bought another bottle. My tank is cycled within 3 days. Sorry Amazon, can't give you good review this time

There is no viable bacteria in these bottles. You can follow all the instructions like I do every time, and it will still prove to be a waste. Anyone who is posting reviews without performing tests is fooling him/herself, and contributing to the deception regarding such products. I posted a photo of 2 tests taken 24 hours apart, using the most affordable and widely available API test kit. This product does not and cannot establish biofilter in any aquarium, because, either there never was any bacteria in the bottle in the first place, or that the bacteria can not survive the bottling, shipping and handling process. If you raise the ammonia to the recommended levels, it stays at the exact same level generally forever, until you manually introduce live bacteria via live rock into the system. Even then it takes a long time, generally weeks, for the ammonia to hit zero, after which the nitrites are elevated. Nitrite oxidizing bacteria takes several times longer to get established. I set up new tanks regularly and it’s always the same result, no matter what bottled bacteria I use. Also important to mention, there is no viable bacteria in any live sand either. I send the water samples to actual labs for official results, and I personally have not been able to locate any considerable amount of bacteria under the microscope using these products. Go for plenty of clean, live rock, and keep your animals happy.

DOA DOA, Yep these boys were dudes.Set up 30 gallon tank dosed with DR .Tims ammonium chloride per bottle instructions. Great 2.0 reading.Time for the ONE AND ONLY.--Shook for 2.5 -3 minuets ,Dosed the hole bottle as suggested .Waiting for the cloud to appear as DR Times video explained would occur showing the nitrifying bacteria going to work. SURPRISE-- clear water no cloud.DOA==24-36-48-hrs latter same 2.0 ammonium reading and no nitrite reading.--I should have bought from DR Tims directly so as too have recourse.The experation date on bottle wasJAN 2019 Go figure bad product.Waste ofmoney, time ETC. It sure did turn out to be one and only ""John

This product did not work. It arrived late, hot, and I'm assuming out of date because the expiration date on it is so smudged. I had heard many good things about the company and the product, and as I have been struggling to do a fishless cycle in my tank, I decided to give it a go. It did not work. I waited ever so patiently and followed all the instructions from the bottle and the website. If I had been one of those impatient people who dump this in with a fish to cycle their tank the fish would have been dead. Very disappointed.

Even in shade, my outdoor aquarium gets enough light to turn the water green with microalgae. The afternoon I received this product I added half a dose to each aquarium. By the following morning, the water was clear of algae. No exaggeration-- literally cleared overnight.I had previously tried using a bacterial product made for septic systems, because I read online that they would work as well for a lot less money. But the septic tank bacteria did nothing. I have no idea how long the bottle had been on the shelf, plus the time it spent in transit to Hawai-- there may have been nothing left alive in the septic system product.But Dr. Tim's cultures were obviously very alive and active. I intend to use this for every aquarium or pond I start.

This appears to be dead on arrival from amazon. I have ordered another bottle from an aquatics shop to see if there is a difference. API liquid tests showing 5ppm ammonia and 0ppm nitrite after5 days of daily testing.Update: This product does work well. I bought a second bottle from an aquatics shop and it has worked exactly as described. Over several days I've seen ammonia reduce, nitrite peak and fall off and nitrates building up. This clearly indicates beneficial bacteria have established in the aquarium.I can only assume as others have stated that amazon may not be storing the product correctly (either too warm or perhaps freezing) and therefore killing off the beneficial bacteria during storage.

I was skeptical at first, having cycled tanks previously taking a minimum of a month i didnt think that this bacteria would do as advertised. However, i recently set up a small 60l aquarium, followed the instructions and less than 24 hours later my ammonia is almost nil. Nitrites still need to drop but usually takes at least 2 weeks for ammonia to drop to nil so already definately worth the money.

I've been trying to cycle my tank for months, so I bought this to try and speed it up. I put it in yesterday, when my readings were 0.5ppm for ammonia and light purple (not sure what that is) for nitrite after a 30% water change. Tested again tonight and it's roughly the same, which is pretty good seen as it's been a lot higher after a night of no water changes in the past. So far, it's looking like it's working! Just be prepared to have a lot of 'bits' floating around (I'm guessing this is the material they use to stick the bacteria to to transport it).

I used this with DrTims Ammonia and 2 weeks after starting the cycle my nitrite was off the chart.Im very glad i didnt add any fish as that would of been very cruel.

I tried bac bombs , biological enhancers and all sorts if other stuff whilst emergency cycling with a sick fish .. no2 n 3 n amonia just would not level fast enough . 1 bottle of dr Tims all at once levelled amonia a d no2 to 0 so fast i was amazed they didnt go back up either(make sure you watch the how to use video by dr tim on Youtube). Best stuff ever, will always have a bottle ready to in case of an emergency