sand swap

[aggie4231]

I would make sure to siphon out some of the nasty stuff that is trapped between the "pebbles" of your current substrate.

[p00num3lli]

yea, thats like my step 3 or 4 i think, to syphon out all the junk, and trust me, i have syphoned my tank 3 times in 2 months and each time it is just as dirty as before. if you just disturb it brown stuff flies everywere. so i have to remove it. lol i really wish i could find someone who could come out and help me with this

[CoryDude]

Yeah, get rid of that marble stuff, bury it and never let it plague this earth again. Your tank's gonna look a whole lot better and brighter w/the reef sand.

Not an expert, but I did 4 X 10 gallon water changes over a 2 week period on a 90 gallon aquarium. It may take longer for your tank. Just play it by ear.

Also test daily for ph and nitrite and maybe nitrate (if they're high). Syphon the tank and do a h2o change asap if you start to detect nitrites. That means somethings decaying in your tank and is no bueno.