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There is 4 cups in our 1lb container, 8 cups in the half gallon/2lb container and 16 cups in a gallon/4lb container.
I want to mix GFO with carbon in the BRS single reactor. Is it OK to use the cheaper GFO to mix in with the carbon or do you need the high capacity GFO? I have a small system so I use low quantities of both carbon and GFO in my reactor. I was just worried about the regular GFO being too small.
It doesn't cause any issues with the reactor to use standard GFO. Really the choice just comes down to the volume of space you have to work with. If you have a large tank you may need more regular GFO then will physically fit in the reactor. Then you either need to get a larger reactor, or use the HC GFO which only requires half the amount.
The easiest way to know is to use the reef calculator at the link below. You just enter the size of your tank and it will tell you how much to run. In the case of your 90g thats about 1.4 cups (22 tablespoons). How long it lasts depends on how much phosphates you add to the tank (which is largely a matter of how much you feed). Pretty typical is 4-6 weeks though.
Depending o the changes occurring in the system you may need to change the GFO if the phosphate continues to rise. In systems with more phosphate the GFO will certainly deplete much faster and will need to be changed. Major tank changes can stir up a lot of left over waste which may contribute to the excess levels.
The best way to know would be to test your water for phosphates using an easy to read phosphate meter like the hanna checker. When phosphates start to increase it would be a sign that the media is depleted and should be changed.
The recommended amount of GFO is 1.41 in accordance with our instructions and the reef calculator. We recommend running the correct dosage when ever possible as it will limit the impact as well as be much easier to tune and tumble.
The GPH through the reactor will need to be set for the volume of GFO so that it has a slight simmer at the top of the GFO in the reactor. If the GFO if not moving it may turn into a brick pretty quickly, or if the tumble is too vigorous then it will end up as as dusty fines from tumbling against itself too hard.
Both will work well on your system! However the High Capacity is more efficient while using less space. The regular will take up more space. Feel free to let us know if you have any further questions!
There should ideally be enough flow to keep the entire column tumbling to prevent clogging. If clogging occurs try removing some media and adjusting the flow. Feel free to let us know if you have any further questions!
You can use gfo in both salt and freshwater, it will remove p04 the same.
This does not contain aluminum and from our use throughout the years unless overdosed to shock the system GFO does not tend to have a negative impact. Feel free to let us know if you have any further questions!
It wouldn't be likely to see any negative effect on your calcium or alkalinity. Its worth noting though, phosphate prevents precipitation (for example the formation of coral skeletons), so by removing phosphates your corals can grow easier which would mean they consume more calcium and alkalinity.
GFO should be changed when it is depleted. How long this takes will depend on the amount of phosphate that is added to the tank. A pretty typical tank that would usually be 4-6 weeks or so but the best way to tell is to monitor the phosphates. When they start to increase that would indicate that DI resin has reached its capacity.
The amount of media depends on the size of your tank with the maximum capacity of the reactor being 2 cups of media, though fortunately with your size tank you wouldn't be in excess of that. For a 90g tank you would use 1.5 cups of media. The easiest way to get measurements for most of these products is to use the BRS Calculator which can be found right here:
It won't be as effective as a reactor and you will want to periodically knead the bag, but it would certainly be better then nothing.
It depends on how much phosphates you have. The more you have, the faster it will need to be replaced and vice versa. As a whole though 4-6 weeks would be pretty typical. The best thing to do would be to monitor your phosphate levels with something like a Hanna phosphate checker. When the phosphates begin to rise that would indicate your GFO is used up and its time to change it.
GFO comes in two types:
- Granular GFO is varied in its shapes and requires the least amount of flow to tumble. Good for reactors.
- High Capacity GFO is twice as dense as Granular GFO, so twice as much material will fit into a reactor. It's extremely hard and has less dust to begin with. Fewer fines will be created during use and transportation. By volume High Capacity GFO will remove roughly twice the phosphate compared to Granular GFO. Best overall performance.
Special note on fighting existing algae problems: Algae needs three main nutrients to grow: phosphate, nitrate and light. Reducing any one of these will significantly slow down algae growth but many not completely solve your issue. Once algae takes hold, it can be a difficult battle but it is winnable. The best offense against algae is to take preventative measures and attack before an outbreak is apparent. Use the following suggestions and be aggressive if an algae problem is already present:
- Maintain undetectable phosphate levels with good feeding habits and use of a phosphate remover like GFO. 99% of all phosphate is added via foods added to the tank.
- Control nitrate levels by reducing feedings, increasing the water change schedule and maintaining a properly sized protein skimmer.
- Use nutrient free RO/DI water for water changes and top off water
- Shorten your lighting period or intensity. In some cases aquarists have found replacing old bulbs that have fallen out of their intended spectrum helps as well
- Continuously remove as much algae as possible by hand.
- Add predators nothing helps an algae outbreak as much as critters who eat it all day long. Various tangs, lawn mower blennies, crabs and snails are all good options. It is also theorized that a healthy pod population will also control algae growth before it gets a chance to take root.
Note: All Bulk GFO is packaged by weight
Great product! By Grant ON on 3/16/2017Grant ON would recommend this product to a friendI've used several different gfo's, mainly rowaphos. I prefer this product much more for several reasons- it's cheaper, better and much more cleaner. I found with rowaphos I would have to run my reactor with at least a gallon of water before it comes out clear. With this gfo it took probably less than half a gallon! Highly recommended
Still waiting for results By RBTA on 3/9/2017RBTA wouldn't recommend this product to a friendSo far after 2 weeks of use in a BRS GFO & Carbon Reactor - Deluxe I have seen no reduction in phosphates. After reading all the reviews I am disappointed in the results that my tank is showing. At this time I am not giving this product a good review, I will update at a later date if and when I see some positive results.
Best GFO on the market By Mitch on 3/6/2017Mitch would recommend this product to a friendI really like the BRS GFO. I find that it is the best value and best GFO that you can buy. I change mine once a month and it makes a big difference in the Phosphate levels. Great for controlling algae and a bargain price.
Good Value By Andrew on 2/23/2017Andrew would recommend this product to a friendI use this GFO in a spyglass reactor to reduce phosphates, which subsequently also assists with algae control in my reef tank. It's price makes a good value.
Makes a difference By Jkor on 2/16/2017Jkor would recommend this product to a friendI use it every month to help with algae control you can tell it works
Low phosphate levels By wolfecs on 1/29/2017wolfecs would recommend this product to a friendI really like this product. I use it in media bag in my aio sump and my levels have been low and barely any algae.
Amazing Product By Jonny Reefer on 1/10/2017Jonny Reefer would recommend this product to a friendNoticeably helps with algae almost immediately
Good By Jkor on 12/17/2016Jkor would recommend this product to a friendChange GFO monthly. I can tell by looking at the algae in my tank if I am late doing the change.
Great GFO! By Stephane on 12/16/2016Stephane would recommend this product to a friendI've installed a reactor a while ago and have been using different media to filter out the phosphate. This however, hands down, is the best media I've tried.
Still the best By Steven on 12/13/2016Steven would recommend this product to a friendWhile the HCGFO is better, you still can't beat the quality and price of regular BRS bulk GFO.
Great product By Tim on 11/6/2016Tim would recommend this product to a friendI would highly recommend this product. It helps with keeping algae in check and off your Aquarium glass.
Great value By Tim on 9/15/2016Tim would recommend this product to a friendWill definitely order again