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I completely replaced my sandbed months ago. The more I vacuum and clean the sand the more algae is growing. Im starting to think there could be something in my water.see our sand rinse thread, last five pages will do. fixes, just by cleaning.
I think not one other thread has more sandbed fixes in fact.
My sand is clean, there is some detritus but not much.I guess its possible for it to be directly fed
are you able to drop a hand in the bed, bring up sand and drop it mid tank without clouding or does that cloud
Siphon it out?Ive been trying everything, GFO reactors, carbon, PhosGuard, extra water changes, black outs, and limited feedings but the brown sandbed algae won't go away. What do I do?
I think they are diatoms. I just ordered a new DI resin. I haven't replaced it in a while.Are they diatoms? I have problems with them because of high silica in my rodi. Whenever I see them it's a sure sign my DI resin is spent.
I would listen to Brandon. He know more about picos and sand than virtually anyone.My sand is clean, there is some detritus but not much.
So did time+1^ Repeated gravel washes did it for me.

You can buy a cheap inline TDS meter-which I'm sure you know -so that you don't need wait for a problem fix it...Are they diatoms? I have problems with them because of high silica in my rodi. Whenever I see them it's a sure sign my DI resin is spent.

My experience is once you cut off the source of silica they fade fairly quick. Like within a couple weeks without having to siphon or anything. I found my issue via ATI ICP-OES testing. They test your rodi water and mine had high silicates along with elevated levels in my tank. I was using a mixed bed DI resin at the time and was having to replace it monthly but it was hard to see the color change indicating the media was spent. Now I have a 3 stage DI resin bed (cation, anion, then mixed) and my issue is gone. Anion bed still goes pretty quick but easier to tell now.I think they are diatoms. I just ordered a new DI resin. I haven't replaced it in a while.
I have a spectrapure with built in TDS and the output showed 0 while still having silicates. I even have a handheld TDS meter that I tested in my Brute container and it was 0. As I understand it silicates don't register well on TDS meters.You can buy a cheap inline TDS meter-which I'm sure you know -so that you don't need wait for a problem fix it...![]()
I have a spectrapure with built in TDS and the output showed 0 while still having silicates. I even have a handheld TDS meter that I tested in my Brute container and it was 0. As I understand it silicates don't register well on TDS meters.

