GHA on Monte

CAPT_Dave · 03/01/2019, 04:06 PM

New problem. I have some GHA starting to grow on a Monte. Pic in post below.

Tank is 5 years old. Mixed reef, mostly LPS but starting to try some easy SPS.
- 120g display with 30g sump/fuge with chaeto under grow light.
- Lights are SB Reef box light LEDs on 100% Blue/UV and about 20% white. Pictured location is at very top of tank on a large rock that I cannot remove without taking off hood (no).
- MaxSpect Gyre and 2 jaebos pushing lots of flow.

Parameters
Alk 8.7
Ca 420
Mg 1320
NO3 2.5 ppm
PO4 0.07 ppm
SG 1.025
pH 8.2 - 8.4

There is also some bubble algae.

I was dosing vodka but scaled that back and then stopped that as well as GFO when NO3 and PO4 were undetectable and I started to see bacterial slime in shaded areas.

I know the GHA is coming up due to PO4 and I can get that under control but don't know what to do about the Monte. Thoughts?

Thoughts on the bubble algae? I really don't want to introduce crabs.

CAPT_Dave · 03/01/2019, 04:13 PM

Photo of GHA on Monte.

You can see some bleaching on the left. That's right under a UV chip on the light, which is only about 12" away. That coral is under about 4" of water so I suspect its the light but there isn't much I can do about that, either given the setup. There have been no changes in light settings in at least two years. Other Montes of the same type that are lower are thriving but the one pictured is the mother colony and it's been there about 2 years. Others were frags that broke off and grew where they fell.

Other SPS include large green Monte cap, a couple digitatas and some birdnests. All doing well.

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Vinny Kreyling · 03/01/2019, 05:01 PM

Move something for more direct flow?

CAPT_Dave · 03/01/2019, 05:06 PM

Good thought but the gyre blows across the top. I could angle it down a little more but the coral on top would really get blasted. They're all SPS so that might be ok. I'd be happy for that Nem to take a walk. I'm sure the Monte would too.

Quote:

Originally Posted by Vinny Kreyling

Move something for more direct flow?

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hegeh · 03/01/2019, 06:32 PM

Well its a dead monti.. might want to frag them out. Im sure no algae would grow on coral unless its dead

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03/01/2019, 04:06 PM	#1
CAPT_Dave Registered Member Join Date: Feb 2015 Location: San Diego Posts: 157	GHA on Monte New problem. I have some GHA starting to grow on a Monte. Pic in post below. Tank is 5 years old. Mixed reef, mostly LPS but starting to try some easy SPS. - 120g display with 30g sump/fuge with chaeto under grow light. - Lights are SB Reef box light LEDs on 100% Blue/UV and about 20% white. Pictured location is at very top of tank on a large rock that I cannot remove without taking off hood (no). - MaxSpect Gyre and 2 jaebos pushing lots of flow. Parameters Alk 8.7 Ca 420 Mg 1320 NO3 2.5 ppm PO4 0.07 ppm SG 1.025 pH 8.2 - 8.4 There is also some bubble algae. I was dosing vodka but scaled that back and then stopped that as well as GFO when NO3 and PO4 were undetectable and I started to see bacterial slime in shaded areas. I know the GHA is coming up due to PO4 and I can get that under control but don't know what to do about the Monte. Thoughts? Thoughts on the bubble algae? I really don't want to introduce crabs. __________________ Dave Current Tank Info: 120 g mixed reef

03/01/2019, 04:13 PM	#2
CAPT_Dave Registered Member Join Date: Feb 2015 Location: San Diego Posts: 157	Photo of GHA on Monte. You can see some bleaching on the left. That's right under a UV chip on the light, which is only about 12" away. That coral is under about 4" of water so I suspect its the light but there isn't much I can do about that, either given the setup. There have been no changes in light settings in at least two years. Other Montes of the same type that are lower are thriving but the one pictured is the mother colony and it's been there about 2 years. Others were frags that broke off and grew where they fell. Other SPS include large green Monte cap, a couple digitatas and some birdnests. All doing well. Sent from my Pixel using Tapatalk __________________ Dave Current Tank Info: 120 g mixed reef

03/01/2019, 05:01 PM	#3
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Move something for more direct flow? __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

03/01/2019, 06:32 PM	#5
hegeh Registered Member Join Date: Apr 2017 Posts: 223	Well its a dead monti.. might want to frag them out. Im sure no algae would grow on coral unless its dead Sent from my SM-G930F using Tapatalk