get the bigger one By Jack on 8/9/2017
Jack would recommend this product to a friend
This stuff is great, holds a bunch of bacteria. But YES, it IS very fragile. Think of it as a big crumbly chocolate chip cookie with holes (seriously) in terms of structure. Also, the 1" version is more than half the price of the 4" version. Which means for less than double the price of the 1" version, you can get the 4" version = which is FOUR times the product at less than double the price. Get the bigger one, and use a hack saw to cut it to your desired size.
This really works! By Gerardo on 7/19/2017
Gerardo would recommend this product to a friend
I've had my phosphates and nitrates at reasonable levels. After I put the 8×8×1 block in my levels dropped about 1.5 in phosphates and nitrates. Now I'm at about .05 or less phosphateso and 0 on nitrates. I installed it in a 125 gal. tank with a 75 gal. refugium.
Not for me By danny on 7/10/2017
danny wouldn't recommend this product to a friend
Personally purchased this to help with nitrates which seems to be the only reason we have lingering algae. Product did not work for me - still dosing vodka for nitrates and still have algae. YMMV
Good product. By Shawn O on 5/25/2017
Shawn O would recommend this product to a friend
Seems to do its job, easy to work with.
Stuff is Unbelievable By FLSharkvictim on 5/17/2017
FLSharkvictim would recommend this product to a friend
Going on week # 3 with just 1 8x8x1'' plate and so far so good. It's lowered my Nitrates already to Almost zero! I sawed very easy the Marine pure to custom fit under my sponge in the bubble trap area in the sump. I just order another box of the 1/2' spheres so they can be placed in my refugium area along the side of my Miracle Mud tray and my mangroves. 5 stars across the board and for the people that checked off only 4 boxes instead of 5 that ridiculous, since it's not Marine Pure's fault it got broken during transportation, that's UPS, FEDEX OR your finest United States Postal service at work.
Great Flter Media By POWERRANGR on 5/10/2017
POWERRANGR would recommend this product to a friend
I bought one of each size for my 90g. The 4" is in the refuge and the 1" is under my skimmer to raise it up to ideal water level with the trigger sump to the max height. Each piece arrived intact and with lots of rinsing, are not breaking apart in my sump. I can use the 1" for a quarantine tank if needed as well. Would buy again
Who Knows By Chad on 3/25/2017
Chad would recommend this product to a friend
I think it's working? I have a small plate in my sump to help with surface area. I am not sure if it is helping reduce nitrates but maybe helping to hold them steady? I don't routinely stare at the sump so I haven't noticed any bubbling from it. The loss of a star is due to A LOT of fines coming from it, even after rinsing it for a solid 20 minutes.
Worthwhile, but fragile By Greg on 2/26/2017
Greg would recommend this product to a friend
Used this to replace foam in my Reefer 250 bubble trap. This stuff is very delicate -- I ordered two. one arrived broken in half... and they're delicate to the touch. Don't put them somewhere that will subject them to mechanical agitation.
Super BioFilter By Jeff C on 2/16/2017
Jeff C would recommend this product to a friend
If you're not using MarinePure to supplement your biofiltration, why are you still waiting? This little 8x8x1 block will substantiate 30gallons by itself, that means you don't need as much in the display, giving you the best opportunity to play with your aquascape and get creative! I have a 46g Bowfront and 1 block of this and had a blast getting my scape perfect for our home!
Easy to work with By SPPF12- on 2/4/2017
SPPF12- would recommend this product to a friend
I have a Red Sea 250. I cut this in half and then soaked it in RO/DI Water. It's crazy how much water it holds. I removed the black sponge that comes with the Red Sea sump and about cut it to make a 2.5" x 14" strip. I cut the marine pure to the to be 4"x by about 14" to be the same same length as the bubble trap. . Now I have the Marine pure just under the sponge in the bubble trap area. :IT its great and while it is fragile it's very easy to cut to the shape you want. I recommend the 8x8x1 for the Red Sea 250.