GHA in Coral QT

mitchrapp · 01/29/2016, 09:38 AM

So I set up a 10g QT tank for corals to go go fallow prior to introducing them to my DT. I put a seeded sponge filter from my DT into the QT and I have been doing weekly 20% water changes. I now have a serious bout of GHA with the phosphate levels around .07 ppm. How concerned should I be? What can I do about it? I really don't want to invest in a GFO reactor for such a small and temporary QT tank, but will if I have to. Or should I just increase water changes? The corals (hammers and frogspawn) don't seem to mind as they still have good PE.

toothybugs · 01/29/2016, 10:47 AM

Spank it with peroxide. It'll annoy your corals but annihilate GHA. Water changes are non-chemical but depending on how long you have to QT it can add up (relatively, anyway). HP is 69 cents for a month's worth. There's also lanthanum but that is kinda costly for short term use. Worth having, though, IMHO.

mitchrapp · 01/29/2016, 01:01 PM

H2O2 sounds a bit drastic. I guess I'm looking for what would be best for the corals:

1. Are they ok with GHA? Just keep doing 20% weekly water changes?
2. Increase the number of water changes? -does the nutrient export outweigh the stress of large (volume and frequency) water changes on the corals?
3. Peroxide dosing? Does the peroxide effects on the corals outweigh the effect of GHA and elevated phosphate levels on the corals?
4. GFO reactor - is it warranted?

01/29/2016, 09:38 AM	#1
mitchrapp Registered Member Join Date: Jan 2015 Posts: 297	GHA in Coral QT So I set up a 10g QT tank for corals to go go fallow prior to introducing them to my DT. I put a seeded sponge filter from my DT into the QT and I have been doing weekly 20% water changes. I now have a serious bout of GHA with the phosphate levels around .07 ppm. How concerned should I be? What can I do about it? I really don't want to invest in a GFO reactor for such a small and temporary QT tank, but will if I have to. Or should I just increase water changes? The corals (hammers and frogspawn) don't seem to mind as they still have good PE.

01/29/2016, 10:47 AM	#2
toothybugs In Memoriam Join Date: Aug 2013 Location: The smallest county in Illinois Posts: 1,986	Spank it with peroxide. It'll annoy your corals but annihilate GHA. Water changes are non-chemical but depending on how long you have to QT it can add up (relatively, anyway). HP is 69 cents for a month's worth. There's also lanthanum but that is kinda costly for short term use. Worth having, though, IMHO.

01/29/2016, 01:01 PM	#3
mitchrapp Registered Member Join Date: Jan 2015 Posts: 297	H2O2 sounds a bit drastic. I guess I'm looking for what would be best for the corals: 1. Are they ok with GHA? Just keep doing 20% weekly water changes? 2. Increase the number of water changes? -does the nutrient export outweigh the stress of large (volume and frequency) water changes on the corals? 3. Peroxide dosing? Does the peroxide effects on the corals outweigh the effect of GHA and elevated phosphate levels on the corals? 4. GFO reactor - is it warranted?