Are my weekly WCs too much?

[Dan I]

I do around 5 gallons of water change every 2 weeks on a 100 gallon system (80 gallon display and 30ish gallon sump). My tank looks great and everything is growing. I do dose a small amount of trace elements every day but I believe the water change can be sufficient enough for me.

 

[coronarex]

It seems confusing at first, but once you pick a method and go with it things simplify. Moving from 5-10% WC weekly to 20% biweekly is an easy step. You've got the right stuff to start dosing 2-Part. Nutrients will creep up a little bit due to the less frequent water changes, but that's part of what you want right?

I'm a big advocate for simplicity (plus weekly water changes are very tedious). I dose 2-part and do 20% WC every other week. Calculating consumption was tricky for me at first, but it's really simple once you read the right info. You're doing things right for sure. Now it's time to take the next step and going slow would be doing what I've stated above.

Thank you. I really appreciate all the help.

 

[PatW]

You should measure your ALK twice or three times per week and hand dose ALK to keep it stable. If the uptake is consistent you can use dosers. People who raise SPS corals tend to measure ALK daily.

You could measure Ca once per week and dose as needed.

I dose 2 part by the way.

As for water changes, if the salinity, temp, match and the ALK is close, you can change as much as you want. Expense and labor keep most of us from going nuts on this.