Should I be dosing an established tank?

[elchopo]

I bought a 75 gallon saltwater tank secondhand that has been running for a few years. Brought it over with all the saltwater and I have done a small 10 gallon water change with the same saltwater (found the company that maintained it previously and buy it from them). I do also add a gallon or two of distilled water every few days to top it off.

With the tank it had b-ionic calcium and alkalinity but it looks like it was never used and a few years old.

32 oz. Package - ESV B-Ionic Calcium Buffer System

Each ESV B-Ionic Calcium Buffer System has two components - Alkalinity and Calcium. When used in equal parts, easily maintain calcium and alkalinity levels with no mixing of powders, disruption of ionic balace or addition of organic chemicals. Formulated to provide all the proper ratios to...

www.bulkreefsupply.com

The tank came with probably 70 pounds of live rock and 2 branching hammers and 2 leather toadstools.

I do not have the best lighting set up and I am looking to upgrade them soon.

Just wondering if it's okay to help the corals out that I have. I dont have any test kits yet but I assumed adding distilled water adds nothing to the tank.

 

[reeferguy3303]

For that amount of coral dosing isn’t needed and you don’t have a test kit, which is needed for dosing

 

[elchopo]

For that amount of coral dosing isn’t needed and you don’t have a test kit, which is needed for dosing

Thanks. They seem to be doing fine anyways. I just came across those bottles so I was curious.

 

[Idech]

You should get yourself an ATO to keep your salinity stable.

 

[SPS2020]

As @Idech said, consider an ATO to keep parameters stable.