Brand new and calibrated refracto versus new Coralife Deep Six hydrometer. Since neither reading is particularly desirable, herein lies the dilemma. An average of the two would be ideal, but the likelihood of the true specific gravity being much closer to one or the other is far greater...

Ok last night all 3 of my brittle stars were just fine and ate small peice of shrimp. I did notice that one of the stars had lost part of it's leg. Today when I came home I found the same one with no legs and just his body with a couple of stubs. I thought he was dead, so when I tried to get him...

I bought a pink sea urchin yesterday ( actualy I bought it thursday and waited till tank perimeters were just right), I aclimated him and 2 fish. All night he moved around the tank cleaning and then this morning he stopped and started losing his spines. They are just falling off/ Any idea...

i've heard of these magic things called refractometers but my lfs does not have them.. where would i get them. and whats a good brand ?

So I've had some Xenia in my 75g for about 3 weeks now with no problems. Last weekend I put some frogspawn in and I think it was a little too close. I saw it stinging the Xenia about a day later, so I moved it away of course. Now all the sudden my Xenia is shrivled up and real small. Do you...

Okay, so I got excited when visiting my LFS (love your TLA's on this site - three letter acronyms) and have cranked out about 500 on a cube - 24g. It's been up 2-weeks now and I have seen no NH3, NO2, NO3 (am surprised I see no nitrates). I will admit that I did not start testing till day 12...

Hello all, i really have NO CLUE what i'm doing or how to do it or what to get. I have read around but i am just lost. I am going to purchase a 20 gallon tank tonight. I need to know what else to buy. I'm looking to get a nano reef like this one...

hey all need some help with following beside of live rocks Ive added some rocks i found from a mountain , will it be as same as live rocks ? i had lack of calcium so i bought aquacal, will i have to add it everytime i do water change? Ive added fire shrimp last night and died within...

I've had my tank set up for a few weeks now and every few days the salinity drops below 1.02 and I have to add more salt to bring it back up. Why would this be happening? I thought salinity would increase because of water evaporation, but mine keeps decreasing? Do I just have a bad...

i have my RO water filled up in my new tank. The heater is on and heating the water. I have 4 powerheads running on the top of the tank on each corner. I am ready to mix the salt and add pH buffer. I just need some advice on the best way to do this. I bought Instant Ocean salt and a pH buffer...

Hi, my sg reading is just around 1.025, which i have read is very low. We should target 1.027 right? How do I increase salinity without causing damage to the inverts and corals? Please advice. thanks.

So I broke my swing arm hydrometer last night and I always told myself that the next thing I would buy would be a refractometer, but then I see threads like this http://thereeftank.com/forums/showthread.php?t=99848 So what's the deal.......which one do I buy?

I'm looking into some stuff to suggest we carry at work for products, we have mostly API and Wardley stuff.... we have no reef additives, no salt water meds, and we don't have a line of SW foods other than Sally's Frozen (which is great stuff).... I was hoping to pick some brains and get...

I'm going to downgrade to a smaller reef so I am selling my current system Here goes: 120 gallon (48x24x24) tricon acrylic tank with center overflow Large sump gen x 6500 return pump 2x400 watt Sunlight supply hqi ballast, with radium bulbs, mogul sockets, and reflectors 2x110 watt vho ballast...

is there any way i can check my hydrometer against a solution that is right on? without going somewhere to find a refractometer...(ex...mix a solution to exactly 1.025 and check my hydrometer, but how would i know the solution is 1.025?)

Hello all, I just love these forums! I have alot of questions, but I want to see what kind of response I get before I ask alot of silly questions. This is what I have and what I want to achieve. I would like to have a safe and healthy reef/coral and fish tank. my specs. I have a 40 gallon...

This is what's going on I got my tank setup put in my sand and water and reading at .022 before and I assumed it was all good. Bought some live rock today about 40 lbs for my 70 gallon tank. Anyways it's all in now and I'm feeling nervous cause I tested the water again and its reading .019 I...

I cannot hardly believe this.. I have two of the Deep Six Hydrometers and a refractometer. if these things are really this far off I cannot beleive they are even allowed to sell the Deep six.:doh: my Deep six says 1.021 my refractometer says 1.026 is this really true? my refractometer came...

We are needing to make a DIY auto top off as well as a DIY power panel or box. I saw on the computer somewhere where someone had made one in a box and had the instructions and diagram. If you have something or know where we can look just let us know. Thanks,

OK.... when I started my tank back in 03 I had a colt coral in there for over a year as well as a ton of polyps. All flurished! then all of a sudden everything started to die. water parameters are fine. I thought it was my tank inhabitants picking at them.... I was wrong. I then thought...