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or have your parents take a water sample to a reputable LFS. tvan

ecooper..... this may help. http://www.reefs.org/library/article/d_knop2.html HTH tvan

For what I've read...... a clam is able to sustain itself through its' mantle it's entire life ie that's why it has all the brilliant colors. Or there would be no wild giant clams. I understand the little critters that make up the mantle also ingest nitrates. fwiw tvan

fpanther.....not enough information. reef temperature normally ranges from high seventies to mid to upper eighties. Consistency is not the norm on a reef flat. variance is. fpanter your answer lies in the critters and coral in your tank, and where they are from. Research my brother. Tvan

If the rock was packed in wet newspaper, and not fully submerged. You are curing your live rock again ie nitrate spike. HTH Tvan

I had a 265 .... 2 coral cats.... a japanese wobie. 1hp chiller 30gallon fuge . 20 gallon sump. 4" sandbed. Watching the cats swim reminded me of caged Tigers. So I built a 400 gallon plywood tank....In an outside greenhouse. Charlie took that out as well. Now I have a 20gallon coral garden...

Yes there are right answers always. I have kept sharks and killed sharks........ I say killed because 2 died in my care through hurricane Charley(no power for three weeks, summertime, Florida ). One survived. These beautiful creatures should not be kept in cages IMHO. A caged water...

Anything that dies in your tank can cause an ammonia spike and be harmful to tank. Therefor if it dies remove it as quickly as possible. Most (live)sponges enter our tanks in live rock. And filter our water. Other types sold require special care....ie they clog with detritus and need low...

And if he needs a chiller? A 1hp costs alot to run. Tom

If you rinse them you destroy the bio filtration. Filter large particles before the bio balls. HTH Tom

Live rock does very little for nitrates and can become just as clogged as bio balls and just as ineffective. Skimmer and a way to remove solid wastes before they degrade(filter felt). Tom

mosley, 1000 gh is a bit steep, 10X per hour is fine for a reef. Protein Skimmer bigger the better. With sharks more filtration. Your tank size is going to end up stressing your shark(slow death). And coral cats do swim, and need room, and jump! Spend the money now or bury the shark...

Why not buy him, leave him in the zoo, have him tagged, pay for his upkeep. And.... enjoy him for years . Tom

Turn over rate is not a big issue. A skimmer will take care of O2. A sump with filter felt is a plus (reuseable) one that degases a trickle type filter. Don't over feed and you don't have a left over problem. I you want tank mates don't get the shark. I have a 265 ..25"X25"X96" with only a...

Cartman101, If you put the pond outside HEAT is going to be a factor. I know I live south of you. I have two coral cats and a wobie in a 265. It's not big enough IMHO(I Have had them for two years). GO biggger now or pay later. I am. Tom

Rapheal, What are the water parameters? What is the water temp( If high depeats 02) Is the shark active at night? This animal is nacturnal. What else is in the tank? Tom

You can use any type of filtration as long as it can handle the bio load. Water quality not filter type. hth Tom

Catman101, Your Bioload will overwhelm the 55 long before Christmas. O2 levels will be hard to maintain. I the "big tank" falls through you'll have a lot of dead fish. Please reconsider Thanks Tom

Throw the live rock in your sump. Build caves or somthing the animals can hide under during lighted hours(catsharks and wobbies tend to be creatures of the night). The more swimming room for these animals the better. Also cover your tank sharks like to jump. HTH Tom

Bio balls are just plastic and work the same as live rock(bacteria farm hence the term bio). If you let them clog up with larger particals of matter they lose their fuctionality. Live rock how ever has other life forms besides bacteria(sponges clams fan worms) that also help reduce nitrates...