Small problem..

So i just went down to my LFS and bought 10g of saltwater and I had to do a 5g top off with saltwater..Then i cleaned the tank with a siphon and did a 6g water change.

I tested the the water and it came out to be very high nitrates around 60ppm(WOW!) I am wondering why it is still so high after the water change? the rock is cured, everything is from the same system and he didnt take great care of the tank, but it was running, water was clear,fish and corals were doing okay.

I put 20g of his water, and replaced it with 10g of fresh saltwater, i dont get why nitrates are still high though.

 

What was the water before the change?

 

High, i brought a few fish down there and he tested it and he said it was 60-80..But it dusnt give a accurate test..Just rounds off numbers.

 

I think the water from the LFS is bad.

 

it isnt, been using it for a year, never had problem with it..He uses Reef crystals.

 

Have you tested their water on your own. Their RO/DI filters may not have been changed for a long time if they are using RO/DI. It is good to test your LFS' water independently anyway.

 

+1. LFS has bad water, which you just added to your tank.

 

I would buy a RO/DI unit, instead of trusting the LFS. Remember, most LFS are here to make money.

 

agreed. get an ro/di unit from spectrapure; there very good IMO

 

Ill try, my neighbor has one, and i buy water from him..I may just start making my own water.