General Aquaria Discussion • What is growing on my rocks??(see pic)

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What is growing on my rocks??(see pic)

Postby Sickcichlids » Tue Oct 03, 2017 10:03 pm

This is a fairly new tank and i do not leave the lights on very long each day.These reddish brown spots started growing on the top surfaces of the rocks facing the light. They rub off fairly easily and seem almost powdery when they do. What is it and is it harmful? there is not really any green algae growing yet which im also curious about because its been running over 2 months. I have 12 african cichlids(mbunas) which are all healthy and active.The water is a steady 78 degrees ph-8.2 nitrates-10-40 max n i usually do at least 15% water change weekly.there is a very small amount of aquarium and epsom salt and baking soda i used to help raise ph and alk of tap water a few times. i assumed this is red-brown algae but if so why do i not have any green algae??
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Re: What is growing on my rocks??(see pic)

Postby caldwelldaniel26 » Tue Oct 03, 2017 10:17 pm

Diatom algae, it's very common in new tanks. Usually it goes away on its own after a while
...Surviving doesn't always mean they're thriving...
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Re: What is growing on my rocks??(see pic)

Postby Sickcichlids » Wed Oct 04, 2017 8:50 pm

Ok cool thank you. I actually did notice some green algae growing on the back wall of the tank theyve been scrapping at so that made me feel a little more relieved that things r normal. What do u mean that surviving isnt always thriving? Is there somthing about my tank that isnt good for the fish or?? They seem very healthy and brightly colored, active,poopin normal ,aggresive, etc. But if theres somthin im doin thats no good i would def appreciate the info. .
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Joined: Tue Aug 15, 2017 8:42 pm
Location: Riverhead, NY 11901

Re: What is growing on my rocks??(see pic)

Postby thornsja19 » Wed Oct 04, 2017 8:52 pm

That's just his signature. Like my signature has the list of my current tanks. Don't worry, it's not a reference to your tank
60g 1 Gold Severum, 1 Electric Blue Acara, 1 Platinum Angel, 1 Firemouth, 4 Rainbow cichlid, 10 Tiger Barbs, 1 BN pleco, 1 ABN pleco
10g German Blue Ram pair
3.5g Male Betta, Dwarf Cory cat
3.5g Male Betta
All tanks have MTS and Assassin snails
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Re: What is growing on my rocks??(see pic)

Postby Sickcichlids » Wed Oct 04, 2017 8:58 pm

haha ok got ya .thanks
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Re: What is growing on my rocks??(see pic)

Postby caldwelldaniel26 » Wed Oct 04, 2017 9:38 pm

Sorry about that, you're not the first one that thought I was insulting their tank or fish lol. It's just meant to be a reminder that doing the bare minimum isn't the best way.
...Surviving doesn't always mean they're thriving...
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Re: What is growing on my rocks??(see pic)

Postby morrismorris » Tue Oct 17, 2017 11:31 am

My diatom outbreak made the tank look like a mess but after a while, it all turned to green algae, which I like. I suppose some get a pleco to clean it up but I enjoy seeing it and watching the mbuna nibble at it.
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Re: What is growing on my rocks??(see pic)

Postby Ziggyno » Tue Oct 17, 2017 5:48 pm

How much time needs to go?
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Re: What is growing on my rocks??(see pic)

Postby DJRansome » Tue Oct 17, 2017 7:39 pm

Several months.
125G Borleyi, Multipunctata
75G Demasoni, Msobo, Lucipinnis
75G Calvus, Similis, Petricola
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Re: What is growing on my rocks??(see pic)

Postby morrismorris » Tue Oct 17, 2017 9:24 pm

It was probably a good month before it turned to green algae but I imagine every tank will respond differently.
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