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thanks Demosthenes, I was waiting for an answer. I will not disturb the sand bed.

Hi, I have a 75 gal tank and have recently added marine sand over the existing dolimite. It is time for a water exchange. If I vacum, is the sand going to end up under the dolimite? Should the sand be on the bottom? I kinda like the way it looks with the sand on top. Thanks, Paul

not sure exactly, but my 75 gallon is 48X18X20. based on the numbers you have given, it sounds to be more like 100 gallons.

Hi, I have a tank that is a about 4 months old now. 75 gal 45 lbs live rock 50 lbs dolomite protien skimmer amiracle sl-50 aquaclear 500 under gravel w/2 660's 78 deg 1.023 I have slowly added: 2 damsels 8 blue leg crabs 2 clowns 1 yellow tang 1 tangerine wrasse 1 peppermint shrimp 1 camel...

Hello, I am setting up my first marine tank (75 gallons). I have the temp at 78 deg, and a protein skimmer running. I am thinking of adding an Amiracle SL-250 and perhaps a Fluval 404. Any thoughts on my choice of filters? Also, I would like to set up a communtity tank with coral, inverts and...