Hi all I'm new, and have a reef tank, 1200*600*500 and I have this problem of green algae, I have tried everything to try and get rid of it but it just continues to grown seemingly overnight, We lost all our corals and fish bar one female marroon clown fish. We cleaned the whole tank out, brought in some new live rock. and kept some of the old. we cahnge the water at the start every three days, now we do it weekly, normally 60 litres. The test for phosphates and nitrates are low, so I would like to know if I am doing something wrong.
what kind of skimmer, lights, feeding routine, types of food, exact water parameters, depth of sand bed/substrate, sump/filtration?, size of tank?, how old is it?, exactly what kind of green algae? like grass?, anything and everything else you can include. pictures help.
welcome to the forum.
IMO i wouldnt use any algae chemicals esp when the problem isnt fixed so its a temp solution. it also could be trouble using things like this in a reef or any saltwater tank for that matter.
just from what i see in the pictures your going to want to remove the bio balls. these are great for a freshwater setup but for saltwater they trap debris and detritus building up excess nutrients causing algae blooms like this. are you using RO/DI water? how old are the bulbs? the more info you can include the better we can help
Ok Ill stop the treatment it wasn't doing any good anyway. I brought two of the white light bulbs a few months ago, the store didn't have aymore so have been waithing for stock to arrive, I am due also to update my blue lights. Do you think these may be contributing to the problem. I'm not sure what RO/DI water is, we live out in the bush here in Australia and have only bore water,or rain water, we have had it tested on a regular basis and it is very pure. When all our fish died we cleaned out the whole tank, including the Bio Balls which were full of awful smelling stuff, but we were told to put them back in and when we had the tank up and running smoothly, start to take them out a few at a time to get the tank to slowly use the live rock instead, is this correct?. The tank has never come good though so have not started to remove the balls. Should I just remove them all at once or Gradually?? Thank you so much for your help, I really appreciate it.
remove them gradually, that way you don't disturb the bacteria population in the tank and you let the bacteria in your liverock and sandbed multiply to make up for the removed balls, without going through a mini-cycle.
It looks like your skimmer is working well, lots of good gunk in the collection cup :-D. If you have other mechanical filtration in the system (sponge blocks, filter socks, etc...) you might consider removing them too, or at least rinse them out very frequently, otherwise they will pose the same problem as the bioballs (trapping junk and allowing nutrients to build up). How large is your tank, and how many pounds of liverock do you have? Assuming you have sufficient liverock, then the liverock and skimmer together should be plenty of filtration for your tank, perhaps eliminating the bioballs and possibly sponges/socks if you have them will help. :dunno:
remove them over time. a handfull every few days or once a week. how much live rock do you have? good flow, a quality skimmer, enough live rock, good feeding habbits and a water change here and there should be the basics of your filtration. you can also have a UV sterilizer and carbon/phosban reactors ( which i suggest )
sumps are good to for added water volume and a place to hide this stuff.
your water source may be the contributer to this. RO/DI is reverse osmosis water which is filtered water. your water may be high in phosphates and/or other trace minerals feeding your algae in your water source.
Hi Again one fish, I tested our water supply with no traces at all to phosphates or nitrates, and Conger thankyou and one fish for that advise on the bio balls, Iwill start to take them out a little every week, I;m not sure of the exact weight of live rock I have in the tank at the moment, I will have to try and weigh it, is it important to know this figue??? I know I pulled alot out and have about a third of my original amount, but will try and get a true weight for you.
no need to pull it out and weigh it. i was just wondering how much you had.
The reason your test kits aren't reading NO3 and PO4 is because they are bound in the algae. If you didnt have any of those minerals, you wouldn't have algae. You need to manually pluck the GHA out of the tank. Get a bowl full of water and pluck a pinch full out of the tank. Then dip your hand in the bowl to rinse the GHA and any spores released into the freshwater and then do it again. Yes, it sucks, but manual removal is the best. You then need to do a water change, 10%, and try to catch any GHA that's free floating. Then the next day, do it again and then the next day and you'll see you'll have success this way. I never recommend scrubbing the rock as that is only temporary and the roots just grow right back.
This could be the result of the bio-balls releasing finally and it's messing your parameters up.
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