Richard Posted June 13, 2003 Report Share Posted June 13, 2003 i know the purple coloured coraline algae is good on live rock.... but i also noticed some green coloured stuff growing on some of the live rock as well...are these good???? Quote Link to comment Share on other sites More sharing options...
reef Posted June 13, 2003 Report Share Posted June 13, 2003 it could be that you are over feeding, what size is your tank and what type of protein skimmer are you using? Quote Link to comment Share on other sites More sharing options...
Richard Posted June 14, 2003 Author Report Share Posted June 14, 2003 nope...not overfeeding...feed them once a week or less... sometimes once a fortnight... tank is 3 feet... protein skimmer...dont know what type... the green stuff is just like the coraline algae... it is just like colour on the live rock...not like grass or something... just like the live rock becomes green in colour...the green is a bit bright in colour Quote Link to comment Share on other sites More sharing options...
reef Posted June 14, 2003 Report Share Posted June 14, 2003 it sound like you got cynobacter, which is cause by excess nutrients, do you use a dioniser to filter your water. and how do you mix your salt. do you filter your tap water? also your skimmer may be to small, Quote Link to comment Share on other sites More sharing options...
Richard Posted June 14, 2003 Author Report Share Posted June 14, 2003 dont use tap water... use water from the sea...so that cant be the problem.... Quote Link to comment Share on other sites More sharing options...
reef Posted June 14, 2003 Report Share Posted June 14, 2003 that’s the problem, sea water is not that clean and has a lot of organics which algae feeds on, I guess you skimmer is way to small to be able to remove large amount of organics. so if you use sea water you will need a big skimmer. Also how do you replace your evaporated water ?? i lose about 5 litres a day and have to replace using a DI unit. Quote Link to comment Share on other sites More sharing options...
Pies Posted June 26, 2003 Report Share Posted June 26, 2003 Reef is right. I use seawater, and have a slightly overpowered skimmer for my tank. Natural seawater is shocking really! Skim the crap out of it if possible. Also clean the skimmer out every other day if you can, a clean skimmer works a lot better than a dirty (just clean the collection cup and neck). Also the question of freshwater topup is important. I too evaporate about 5L a night, topup with 5L of Kalkwasser using RO/DI. Questions about 'unknown growth' are always going to be tricky, but agree with Reef it is prolly a Cyno. Water needs to be tested. What is you Phosphate? Are you using Phosphate killer? Also Salifert do an organics test kit, I never bother though. Your Nitrates etc ok? Also whats your salinity? How much topup do you add a day? Pies Quote Link to comment Share on other sites More sharing options...
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