bubbles on rock

A pic and more info on your tank would help but sounds like Cyno to me. Water changes, higher flow and cutting your light cycle down usually helps along with cutting back on your feeding. A UV will only cover up the problem so you are better off getting to the source of the problem. What are your water parameters, flow, lighting and how old are your bulbs and how long has your tank been set up.
 
water tests finenow although i did ave a prblem with ph earlier in th week.
The bulbs are old, i have 2 flouresecnt tubes (3ft), one is an actinic blue and the other is a marine daylight. They could both do with replacing but im holding back to save up for a halide unit.
The tank is a juwel 180 and i have 2 korilia 1500ltr powerheads. I have A fluval 205 external filter which i am going to replace with the fluval fx5.
I think i could do wih more flow myself. Would a picture of the tank help?
I have rcently changed to this tank from a 60ltr, but aprt from the powerheads, everything else was from the old tank.
 
If it is air bubbles on the side of the tank that is one thing, However I would tend to think by the description, and without a pic that it could be bubble algae. It is bad, and the more of the bubbles you break the more it spreads.

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If it is air bubbles on the side of the tank that is one thing, However I would tend to think by the description, and without a pic that it could be bubble algae. It is bad, and the more of the bubbles you break the more it spreads.


I do have a couple of bubbles like this, but thats not causing any problems yet. I will try and upload a pic for you all.
 
That looks like red slime algae, AKA Cyano. This means one of three things, or a combination of all. Not enough flow, high phosphates, or high nitrates. One or all of these things is causeing the problem. What is your flow in the tank? What are your nitrates and phosphate levels? Do you use ro/di water? How much/often do you feed? Do you use a skimmer?

Now algae doesn't grow like you have it growing in your tank unless it has a lot to feed on! I can see hair algae all over your other rocks in that picture, this is bad too. Something in your tank is way off!!! I know you said in an earlier post that your water was fine, howerever "fine" does not tell us anything. What are the actual number from your nitrate and phosphate tests?

We will see if we can help you get rid of the problem, if you can answer these questions!!
 
What is your flow in the tank? What are your nitrates and phosphate levels? Do you use ro/di water? How much/often do you feed? Do you use a skimmer?
What are the actual number from your nitrate and phosphate tests?
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My tank is 180 litre which is about 40 galls i think.
I have a 2 korilia 1500 powerheads in there, an unknown temporary pump wilst a new powerhead is coming, and an Aqua one Aquis 1200 external filter which is rated at 750lph.
I use ro water from my lfs.
I feed twice a day, just a pinch of flake food (very small pinch), and maybe once or twice a week i will feed a marine mix frozen food instead of flake. When i feed this i chop the cube into 4 pieces and feed just one piece of this when its thawed out.
I use a TMC V2 skim 400 protein skimmer.

I have tested my water today and have the following results:

Phosphate 0
ph 8.1
Nitrite 0
Nitrate 0
ammonia 0.1 (hard to tell but its close to 0-0.1)
Kh 8.3
Salt level 1.018 Is this too low????

Thank for your help,
Lee.
 
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