WaterChange with dosing?

i am having a slight algae bloom and want to nip it in the bud if i can. I have been dosing my tank every couple of days with soda ash for alkalinity. I test my mag and dose if necassary weekly. My question is that when you do your water change wont your levels drop quite a bit if your doing say a 25% change. If so this cant be great for corals. Should i dose my water change water to get it up to par(same levels) if need be?

I was planning on doing the following to control the algae.
1. Large Water Change of 25%
2. Change Carbon and GFO in reactor.
3. Cut back my light cycle by a couple of hours
4. Remove the visible bubble algae on the frag plugs. (Its only on the plugs)
5. Replace the frag plugs that have algae on them, with new clean frag plugs or rock

 

Are you running elevated levels of magnesium to combat algae growth or something? Is this why you're concerned about your water change not keeping up?

Otherwise, your new salt water mix should match the parameters of the tank water in terms of Alk, calcium, and magnesium... if it doesn't you can dose your newly mixed salt water, but I have had problems doing this myself, as it wants to precipitate out in the mixing container, so now I just do water changes and dose in the tank to match levels if needed.

 

I'm just a bit confused by your post because it seems you're talking about dosing and combating algae, but I don't understand the correlation...

at any rate, to get rid of bubble algae, you may consider an emerald crab... they are great at removing it...

 

Thanks for the reply. I am talking about two things in this post. Dosing and combating algae, the main one being combating algae. Because of a water change to combat algae, I was wondering what, (if any) special deeds were done to get the tank back to "ideal" parameters. So i can just dose the tank if my levels are down after the water change? Ill check my parameters of my water change water:-/ but in the past they have not been as high as the levels i try to keep in my tank.

 

my suggestion is to dose the tank, not the newly mixed saltwater...

 

sounds good

 

We have a fairly heavily stocked SPS tank in our 28g right now that requires frequent dosing and frequent water changes. My suggestion is that you test your params a few hours after you do the change and then dose accordingly. Sometimes I have to dose the night of the waterchange, others times not for a day or so. But if you are using a reef type salt (Reef crystals vs Instant Ocean) most of the time the levels should remain stable after the change (unless your tank was low to start with)