What's wrong with my setosa?

[mrhasan]

Here are my current levels:

Ca: 410ppm
Mg: 1275ppm
Alk: 8.0dKh

Right after WC, my levels were:

Ca: 440ppm
Mg: 1380ppm
Alk: 7.7dKh

I am just dosing alk.

WC due on this Saturday morning. I am thinking of moving to 5 gallon WC every 3 days now

[reefermadness]

Definitely some kind of tissue die off. Two possibilities here that have both been mentioned. One being the sweepers of the chalice at night and the other being that its not happy for some reason.

Hope you get it figured out. Good luck.

[Proteus]

Originally Posted by mrhasan

WC due on this Saturday morning. I am thinking of moving to 5 gallon WC every 3 days now

My tank is sps and I do a WC every three days. While some as it not cost effective its 60 gallons a month which most people with bigger tanks do biweekly. I have great growth doing it this was and more nutrient export

Though I am looking at a nano ca reactor as the coral will become more demanding as it grows

[Aquattro]

Originally Posted by Titus99

My tank is sps and I do a WC every three days.

What's the reasoning for this?

[Proteus]

I do a 5 gal on tues and 10 on Fridays. Only because I don't dose or have a reactor yet

It works good to keep cal and alk up without big swings

I am buying a ca reactor soon here so that will stop when I get it

[daniella3d]

I don't think so, each time you do a water change you do alk swing.

It is much more stable to do less water changes and to dose every hour or every two hour.

There is no way doing water change without dosing will keep your level stable and unless you perfectly match your new water alkalinity (very difficult to do with a ULN) you will get swings. Unless your new salt has the same alkalinity as your tank, which is unlikely as most salt mix have high alkalinity.

I have large amount of corals and SPS in my tank and I do water change every month. I dose each day for alk and calcium and my levels are very stable day and night. I very rarely get RTN or STN. Think I had it twice in 3 years on newly introduced corals, never on older corals. I have a setosa that was in pretty bad shape when I got it from fragalot shipping and it is now all recovered after a week in my tank.

So until you do dose, you will never have a very stable tank and you will have lots of alk swings.

Originally Posted by Titus99

I do a 5 gal on tues and 10 on Fridays. Only because I don't dose or have a reactor yet

It works good to keep cal and alk up without big swings

I am buying a ca reactor soon here so that will stop when I get it

[Proteus]

I don't claim not to have swings

I test water before and after and alk goes 6 to 7 which is a small swing. Rather than have a large swing of a biweekly WC
I use RB salt and alk is never very high with said salt
This is just temperat till I get reactor

[Aquattro]

Originally Posted by Titus99

I don't claim not to have swings

I test water before and after and alk goes 6 to 7 which is a small swing. Rather than have a large swing of a biweekly WC
I use RB salt and alk is never very high with said salt
This is just temperat till I get reactor

Sounds fine to me. Lots of work, but still fine

[xenon]

Originally Posted by Titus99

I don't claim not to have swings

I test water before and after and alk goes 6 to 7 which is a small swing. Rather than have a large swing of a biweekly WC
I use RB salt and alk is never very high with said salt
This is just temperat till I get reactor

A swing of 1dKH every 3 days is quite a bit IMO.

The most you can increase alk that is safe is 1.4dKH per 24hrs.