roidan

Modified Sinewave Inverters Less expensive inverters are also available which imitate the waveform to a lower degree of accuracy. As can be seen in the diagram, the modified sine wave inverters produce a stepped waveform. Instead of smooth variations, you can see that the voltage changes abruptly from zero volts to a maximum value and then abruptly to zero again. After a short while the voltage again changes abruptly to a minimum value. A modified sine wave is a rough approximation of a true sine wave. Modified sine wave inverters traditionally have been very popular in alternative energy systems because of their low cost and high efficiency (see below). Most electrical appliances can use modified sine wave electricity and never know the difference.

anyway..just for info: True Sinewave inverters As you can see in the diagram above, a true sine wave varies smoothly from zero volts to a maximum positive value and back down through zero volts to a minimum value. True Sine Wave Inverters produce the highest quality, cleanest power, and produce voltage that most closely resembles that provided by your electrical utility company. All electrical appliances can use the power produced by true sine wave inverters. True sine wave inverters are well suited for delicate electrical or electronic items such as stereos & computers. However, true sine wave inverters typically have a lower efficiency (see below) than modified sine wave inverters and higher initial cost. Because of this, a small true sine wave unit is sometimes employed to power a specific appliance or two, while the rest of the household runs on the cheaper and more efficient modified sine wave inverter. These types of inverters are decreasing in cost all the time and are simultaneously becoming more efficient. We can probably expect that they will become the standard in a few years

yeah..remember to ask your colleague to get the SMART series..not the normal APC BACKUP series....its the APC SMART-UPS series..only the SMART series outputs pure sine wave if i am not wrong... but some pumps may run just fine on stepped/modified sine wave though...but i am quite sure eheim is very picky on the waveform...it turns noisy and outputs less water when using modified sine wave backup....my personal experience...

actually the other side facing the main tank also has the same mesh netting...thats why i keep a distance of 6 to 7 inches so that air can come in thru that channel and blow out from the other channel.... well...well test run when the whole system is up to see what is the distance i should keep..hehe..the most install some AC fans inside the cabinet lor...sure can ventilate one..lol

er....this model is actually more for server users...hehe i not sure market prices how much for a new one..but i am sure it may hit pass 1k....coz this SMART series of UPS outputs pure sine wave....more suitable for pumps.... the other APC or other brand UPS tend to output stepped sine wave...meaning not pure waveform...hehe.. i am not sure lah....other computer experts here may be able to shine the light on this issue... this one is a lobang from the source (matrix ) yeah..too many will shorten the power backup when mains supply fail...just have some that circulate the water can liao...maybe just power my tunze 6060 and TS7 ...

My reef-saving power backup is here.. rated to provide 100W of power for 3 hours... 50W for 5 hours... i intend to put the 6060 tunze 11W to this...i am sure it can survive the longest HDB power outage..hehe

thats true...but i prefer one side air come in..one side air come out..so the best way is the 2 sides lor...bo bian lah...dun put in cabinet...too unsightly..put in a all enclosed cabinet...heat problems... so compromise lor

hehe..some things if u like must act quick...if not...gone liao

haha..i already know liao lah...3 clams up for sale mah..such lobang how can i dunno one..lol

hahaa..who say i not around..LOL but the colours seem that i have or not very keen to have... and..i stay sengkang ok..if i wanna grab...bwilly bro..u got no chance hehehe..kidding

havent yet lah...must test the water first....then can put stuff

havent yet...will fill water today

wah bro lvcap...watching champions league ah...good morning

er..i think its logical to assume u spend much more time looking from the front of the tank then from the sides mah..better have a same cabinet keeping it rather than a small chiller with the long tubings at the side of the tank mah...after all...i will be keeping the MH ballasts inside the cabinet also..lol

hehe..i think its just a body mark...something like a birthmark..dun think u can do anything to it

hmm..noone knows? dunno whether should i remove it or not

yeah...most of them...i cured in a blue tub weeks before the tank came...so u can consider when the tank came...all the rocks that went in was cured and minimal cycling....there was some colour change before i added any corals or fishes...i waited till ammonia and nitrite was nil before added anything...u can follow the colour change of those tests in this thread.. and till now....nitrate still around 5ppm... the peak was 10ppm..i also dunno what miraculously happened in my tank... could be...the tons of rock....the liquid bacteria i used (Microbe-Lift Special Blend).....the macroalgaes...or even some AZNO3 that i used initially but now very long never use liao....i am still bewildered...and also the 7inch DSB which definitely havent kick in yet....and maybe the twin 2014 weipro skimmers...but i transferred quite alot of sand from my previous 2ft sump into this...only the top 1inch layer coz afraid of sulfide poisoning..hehe i also dunno what is the chief factor..thats why i used tetra and salifert test kit to check my nitrate to be sure...i am bewildered also

thanks... actually many pieces in LFS have dead tissues on the gorgonians...hard to find perfect ones....even my red orange one has lost some meat at one branch when i bought it but i am seeing little polyps from the end also..hope it will grow back and cover the dead branch end... now i am looking for the purple specimen...bro williamuk has a very nice piece..but sadly he isn't really active in here nowadays to show you guys

T95....my favourite ahpek..hehe

this one open so-so only

tonite the polyps open quite nicely

2 gorgonians side by side...

no lah..black mesh to let air out mah..if not hot air inside like bwilly said..hehe

haha..its not HOLE lah...its fine metal black mesh...lol...it because of the flash thats why the interior so obvious..otherwise..not obvious at all...lol