Percent of Total Volume Changed

[lefkonj]

Just curious what percent of total system volume people change and how often. Right now I am doing about 18% every two weeks. My bio load is extremely low as my system is only a few months old and I have zero fish, about 1/2 dozen corals.

I was thinking of increasing to about 30% every two weeks but then again not sure if that is too much.

Thoughts?

 

[Brando457]

On my 34 rsm I change about 10% a week.

On me 75g with 75g sump I'm setting up I'll do about 30 gallons every.2 Weeks.

With my 14g frag tank I do 5g a week with no skimmer

Sent from my SAMSUNG-SGH-I727 using Tapatalk

 

[howze01]

If you're going to (pretty much) double the water change volume I think it would be more beneficial to change it to more frequent weekly changes.

 

[malulu]

i am doing 10% every TWO weeks, mainly due to the salt storage/container's size, I would like to increase to 10% per week, but am too lazy to refill it every week, now i only need to REFILL it twice a month.

in the past, I do water change all at once.

now a day, i use dosing pump (LiterMeterIII) to do automatic water change, it's configured to do every minute, and it seems improved the tank health...

 

[TanksNStuff]

I do about 15% every week on my 75G. With all my LR and the extra volume in my 30G sump, it took me 70G to fill my tank/sump up. I do 10G every weekend.

Sometimes, if I neglect adding my Calc/Mag I do a 15G change instead of 10G... then catch up on additives after re-testing first.

 

[Tazmaniancowboy]

My personal opinion is that you are already doing too much water change! We do waterchanges to export nutritional wastes. You specify that you have NO fish! Without a bioload of fish feeding and waste everyday, you may not be doing a good thing by changing big amounts of water. You need fish in there.

The reason I believe this is that I was practically starving my fish for a while to battle hair algae and my corals were all browned out, when I mentioned this to someone who had lots of beautiful corals(can't remember who), they recommended that I start feeding my fish daily and increase the bioload of fish. I increased from 5 to 7 fish in my 200g and nervously started feeding my fish daily. The hair algae turned out to be unaffected, the fish were happy and my corals brightened up to the right colors! I was in total disbelief!

 

[lefkonj]

I need to wait a few more weeks before i do fish again, had a disease wipe me out.

 

[mnat]

I am a big fan of 10% every week, however this is because we have always had smaller tanks and smaller tanks demanded that weekly water change. The bad part was even if you missed a week, doing %20 at once would shock the system and do even more damage. I have always been a fan of slow and steady and %10 a week has always worked for me. Now with all that being said if I had a system over 180g I would probably do 20% every other week as the system is so big you are not going to shock it nor are you going to need to keep the nutrients down (if you are not carrying a heavy stock).

 

[MadReefer]

I change 10g every 2 weeks, 75DT, 30g sump.
Total water volume I estimate is around 80g.

 

[joeyhatch11]

I change 2.5g every week and feed every other day.

 

[Ryeguyy84]

My personal opinion is that you are already doing too much water change! We do waterchanges to export nutritional wastes. You specify that you have NO fish! Without a bioload of fish feeding and waste everyday, you may not be doing a good thing by changing big amounts of water. You need fish in there.

The reason I believe this is that I was practically starving my fish for a while to battle hair algae and my corals were all browned out, when I mentioned this to someone who had lots of beautiful corals(can't remember who), they recommended that I start feeding my fish daily and increase the bioload of fish. I increased from 5 to 7 fish in my 200g and nervously started feeding my fish daily. The hair algae turned out to be unaffected, the fish were happy and my corals brightened up to the right colors! I was in total disbelief!

So you increased the bio load and feeding and the HA went away? Or just continued to grow at the same pace?

Did you ever find the root cause?