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Can someone tell me what is this and if its safe thank you

I purchased 2 of these MH Ballast today this is the specification of the ballast But as you see its 50W and there is no 50W Good reef Bulb what i am thinking of Can i connect these 2 ballasts in Series so that i can hook 100w MH Bulb? with the right color temp?

I was wondering how i can DIY 9w CFL Socket down here where i am (Montreal) i cannot find these sockets thanks

My setup right now is 2.5g acrelic tank what i am thinking of is to buy another 12x6x8 PERFECTO ALL GLASS 2.5g and to glue that to the existing tank so like that my existing tank will be 12x12x8 and to use the new section as sum with overflow. i like to know if this is possible and safe. plus...

this is my tank parameters after 2 months its 2.5g pico with only live rock live sand and chaeto in the 300AC i have 1 snail and 1 crab. i like to know if its ok now to start adding corals? Temp.= 79.5 PH = 8.0 Ammonia= 0.0 Nitrite= 0.0 Nitrate= 0.0 Salinity= 1.025 dkh=...

Hi, all my tank is under ciycle, for almost 2 months now and i have just spotted this in my tank please someone if can recognize it thanks

I am newbie in all this, and trying to set up 2.5g pico with AC300 as Refug. the tank is under cycle with LR and LS only. Just noticed in the AC300 he water surface looks like a very thin layer of oily, and noticed in the AC300 the water is like stand still although it is flowing in the tank...

Here is my newly started under Cycling 2 days old 2.5g Pico tank Full Shoot Another Full Close-up Moon-Light

Finnaly just finished the Stand and Hood for 2.5g with 3x 20w 50/50 Coralife and Coralife Moonlght need your feedback Inside hood Full image Moon Light