SRC Member Batman Posted January 17, 2004 SRC Member Share Posted January 17, 2004 Hi, just curious how long do you guys out there on your MH lights? I have reduced from 6 hrs to 4 hrs.. Do you think sufficent for the corals? Quote Link to comment Share on other sites More sharing options...
SRC Member Benz... Posted January 17, 2004 SRC Member Share Posted January 17, 2004 mine is switch on for at least 10hr in a day.... and the blues one are switched on for 14hrs a day..... Quote Link to comment Share on other sites More sharing options...
SRC Member Batman Posted January 17, 2004 Author SRC Member Share Posted January 17, 2004 wow..... i will kana from my wife ...... my blue is abt 7 hrs.. & feel the corals open better than when they are under MH.... dunno why.....thks! Quote Link to comment Share on other sites More sharing options...
SRC Member sps_dude Posted January 17, 2004 SRC Member Share Posted January 17, 2004 i dont know about u...but to me 6 hours like too short like that....some more 4 hours.....i was once advice to turn it on for minimum 10 hours..... my 2 cents worth Quote Link to comment Share on other sites More sharing options...
SRC Member Batman Posted January 17, 2004 Author SRC Member Share Posted January 17, 2004 thks Dude & Benz... anymore to share theirs ... .. I dun keep SPS.....thks! Quote Link to comment Share on other sites More sharing options...
SRC Member ryz Posted January 17, 2004 SRC Member Share Posted January 17, 2004 what corals you keeping? 4hours way too little. how many watts is your MH. think 8hours min. Quote Live and Let Live Link to comment Share on other sites More sharing options...
SRC Member ryz Posted January 17, 2004 SRC Member Share Posted January 17, 2004 In real life, Sun is out for 12 hours in varying intensity, so IMO you could on your MH for 10 hours. and on your supplement light like PL actinic etc one hour before you on your MH till one hour after you off your MH. that would simulate dusk and dawn?? Just my 2 cents Quote Live and Let Live Link to comment Share on other sites More sharing options...
SRC Member alanseah Posted January 17, 2004 SRC Member Share Posted January 17, 2004 In real life, Sun is out for 12 hours in varying intensity, so IMO you could on your MH for 10 hours. and on your supplement light like PL actinic etc one hour before you on your MH till one hour after you off your MH. that would simulate dusk and dawn?? Just my 2 cents well if u want to talk about simulate. I have once read a gd book/web about this guy who talk about lighting... think post by AT.. forget already... it mention, in nature light is stronger during the afternoon which is around 11AM to 2-3PM. Let say on a 12 hr... Thus it will be best on your "blue" light 1 hr first e.g. 7AM.. then on your PL/t5 on the 2nd hour for 3 hrs.. e.g. 8AM to 11AM.. then off your PL/T5 and on your MH from 11AM to 3PM then off your Mh and on T5 from 3PM to 6PM and then off it and on your "blue" light from 6PM to 7PM... This is the best... so far I dont think anyone here in SG do that... Quote Link to comment Share on other sites More sharing options...
SRC Member ryz Posted January 17, 2004 SRC Member Share Posted January 17, 2004 of course not lah. SO troublesome. Either need someone to be constantly at home during those hours or have to set many timers. hahaha. My way is just a very simple way what not very effective in simulating but, what gives? Quote Live and Let Live Link to comment Share on other sites More sharing options...
SRC Member Golden Tooth Posted January 18, 2004 SRC Member Share Posted January 18, 2004 thks Dude & Benz... anymore to share theirs ... .. I dun keep SPS.....thks! Mine on 10hrs. 1200 to 2200. Quote Bevor Sie das Licht sehen, müssen Sie sterben! Link to comment Share on other sites More sharing options...
Sponsor Glare Posted January 18, 2004 Sponsor Share Posted January 18, 2004 Recommended photoperiod for MH is between 8-10hrs. 4 hrs is really too little for the zooxanthellae to generate enough food through photosynthesis for the corals to survive which is the natural process in which many corals use to survive in the wild. Even with supplementary feeding, the bulk of the food needed comes from photosynthesis. As MH will never be as intense or strong as the sun, therefore it is better to run a longer photoperiod even if it seems unnatural to have the "sun" up for 8-10hrs a day. This is assuming that water quality is good and nutrients are controlled to prevent nuisance algae from growing. Please correct me if I am wrong Quote Link to comment Share on other sites More sharing options...
SRC Member Batman Posted January 18, 2004 Author SRC Member Share Posted January 18, 2004 thks everyone!!! Quote Link to comment Share on other sites More sharing options...
SRC Member boxfish Posted January 22, 2004 SRC Member Share Posted January 22, 2004 My tank is placed at the balcony. At 6th floor, direct sun reach botom part of the cabinet. Not such if my corals are receiving sufficient nature light. In this case maybe I can reduce the no. of hours to on MH. Quote Link to comment Share on other sites More sharing options...
SRC Member nicky30092002 Posted January 22, 2004 SRC Member Share Posted January 22, 2004 Me, 2xfl actinic on for 12hrs minimum ... Mh 2x150w on for Avg 6hrs .. Quote Link to comment Share on other sites More sharing options...
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