Im not sure if you where able to colonize that block this fast to actually lower your nutrients in less than a week, it worked fast for me in about a month, but i think you are less than a week with it?
Im glad you are making progress just make sure everything is not 0.
As to your question, this block is like live rock, just more porous and has a lot more surface area than live rock so less is more (thats what manufacturer states) Filter pads and socks trap detritus that will break down given a couple of days and will leach nutrients into your tqank, I believe Randy could explain further. Filter fads and socks must be cleaned every couple of days to prevent this.
I have a filter pad coming out of my refugium that rarely sees a cleaning, It has not caused any issues yet, maybe the amount of Nitrification/denitrification by the Marine Pure,Rocks and Macroalgae offsets the effects of the dirty pad.
im glad my recommendation to add the MarinePure has helped you if it really is what lowered your nutrients so fast, but beware that being at 0 nutrients as some people suggests could be detrimental to the tank, I would suggest to be around 1-2ppm nitate and phosphates .02-.08(Im no expert either) but My SPS, LPS and soft corals look good at that Range anything less and they take a beating. Also Alkalinity is important to monitor and keep low at thos really low nutrient numbers. Most people suggest around 7-8 at less than 1ppm nitrates .
Do your own research, but I believe corals also need fuel for their bodies in the form of some amount of nutrients N+P, now lets wait for the Experts to chime in.
