Snail problems

[seabry]

I'm having a problem with snails. every snail I have bought has died, old ones, new ones they just died. I have green polyps, and a carpet amenome in the tank and they are doing fine after I added more lights.
salinity is 1.021
pH is 8.2
Alk is 10 (dKH)
Ammonia is less than .25ppm
and well Calcium...my test says 600ppm(i know thats not right, I think the test is defective)
and there is no copper in the water, oh and I use R/O water (about a 20% change every 10 days or so)
I need some help, I have tried to find the answer but I have found nothing useful.

 

[goldrush]

Give us a lot more info-Nitrates? Nitrites? Phosphates?- Salinity seems a bit low,shouldn't have any ammonia,calc is high if your test is accurate. What size tank,how old is it,live rock,inhabitants?

 

[seabry]

lets see the tanks is about 2 years old, and I have two percula clowns and a ornaite wrasse, 3 scarlet hermit crabs, 2 blue legged hermit crabs, and a very large emerald crab. as for the Nitrite level it 0,02 mg/l and the nitrate is 10 mg/l and I don't have a phosphate test, was told really didn't need it, oh and the tanks 33 gal.

 

[leigh]

i dunno what i'm talking about, but just as a thought, the guys at my LFS, recommend not letting salinity drop below 1.022 for invertibrates. Maybe it's just the lower salinity?

 

[slick]

If your amn is at .25 ppm then I'll bet your no2 and no3 are a lot higher than you think. That could be your problem.

 

[pirate_bob]

also I had a big problem w/ my emerald and ...blue legs dinning on my snails..... I ordered twenty snails. and the emerald and blue legs fiested on them untill they were all gone...