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I have used Siporax successfully in my last three set ups. When set up correctly it performs just like additional LR, but with so much more surface for bacteria. Right now I have 10 Liters in my 190 gal. NPS system, heavily feed with 18 fish in it. It took about 8 weeks for it to start working , but right now my NO3 are less then 10 ppm and PO4 less then 0.3 ppm. Keep in mind I don't use any other filtration media. WC is done about 4 to 6 weeks - 50 gal.
Ive been trying "de*nitrate" by Seachem, which is basically the same thing I think. It took a few weeks to establish but seems to be working just as described. It absorbs nitrate and can be left in aquarium to provide more surface area for bacteria to live on. Water test today showed no signs of nitrates. Something worth checking out is, Bulk Reef Supply sells a product called "Marine Pure", it's supposed to be more porous than most live rock and excellent for bacteria. They make em in a few different shapes and sizes for easy sump/filter fitment. Hope this helps!
I USE THIS!!!!! I actually started my tank off with this, because aquarium told me to haha. i personally put the little baggy in there and clean it when its like brown brown. not just a lil brown, but very brown. I was just told it was a good thing to use, and my noobish self bought it lol haven't thought about that since then Im a fan, but have no reasoning behind it +2cents
I built a eggcrate box, and it is in last compartment in my sump. This way no detritus gets in there and it stays clean. I added some Biodigest bacteria to help seed it. I also have slow flow through my sump.Thanks for your reply! Which method did you use? Tossed it in you sump, in a bag, or a eggcrate box? Did you add it to an established system or from the start? Thanks in advance!
@Zoarium , have you ever had a triton test or have any unexplainable issues with your system agree using the marine pure blocks?