Green Algae on Rocks

randyreef93

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Hi all.

My tank has been established now a few weeks and my rocks have started to grow algae I assume looks a bit like moss, is this a bad thing? I’ve got cleaner shrimp, Halloween crabs and snails in there currently, I am hoping they will eat it… or is my lighting too excessive?

Is this the start of the ugly stage or should I be concerned?
 
established for a few weeks as in, the cycle is complete? you’re likely seeing the ugly’s start. if there are no fish you can leave the lights off a few days to cut back on the algae growth. the inverts will be fine with no lights
 
Hi all.

My tank has been established now a few weeks and my rocks have started to grow algae I assume looks a bit like moss, is this a bad thing? I’ve got cleaner shrimp, Halloween crabs and snails in there currently, I am hoping they will eat it… or is my lighting too excessive?

Is this the start of the ugly stage or should I be concerned?
I left my lights off, even with fish, for 3 1/2" months, the only inverts were CUC. That made a TREMENDOUS difference in how much of the "uglies" I saw.
 
Fish dont need lighting ambient room light is enough. I have done lights off and lights on saw little difference in "ugly" stage. With lights on its just going to start sooner. Either way you and the animals you decide to put in will have the biggest impact on how "bad" it gets. Snails, copepods, amphipods, fish such as tangs if you have the tank size for them, blennies, urchins, crabs if you trust them (I don't). Keeping the lights off longer does help to "balance" your tank with appropriate cuc and nutrient control before it gets out of hand.
 
Unfortunately and due to product marketing everyone new to the hobby thinks algae is something to eradicate. When starting with dry rock, algae is a normal progression. Not something to freak out over. Manage, not eliminate.
 
Picture could help us see specifically what kind of algae it is, but from your description it sounds like the "ugly phase" of a tank
 

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I haven’t put any chemicals in, it was filled with salt water, filtered, reef flow 2.0 in there, snails, crabs and cleaner shrimps, this has only happened rapidly over the last few days but I have had the lights on for 10 hours a day…..
 
I would turn the lights off but what are your nitrates and phosphates?

Those bubbles look like Dinos but lets hope not.
It's not dinos in a tank that new. Green algae can pearl to. Diatoms produce air bubbles also and is typically the first ugly stage to show up.

OP you will get quite a few variations of ugly phase algae and bacteria over the course of the first year. Just part of the hobby.
 
The appearance and growth of algae in an aquarium is not bad, it's just the natural order of things. In fact, it shows that an aquarium is well balanced and healthy, and the cultivation of macroalgae forms is actually beneficial. just get some Nassarius and astrea snails
 

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