This is nice. Thanks for sharing tips

EmilyEmily u using what kind of container for the second/filter bottle? I bet it is not easy to poke 3 hole on normal plastic bottle's cap

wow...u sound like mcguyver...oops..should be mcgirlver!!

Feeding my puffers.

Hi miss Emily,
The watt/gallon rule is just a general guideline. for me it is a guideline to check whether i need to supply extra co2 or not. for a lowtech tank without co2 injection the maximum i can go is 2 watt/us gallon. above 2 watt/us gallon i will need co2 injection. the maximum i can go is 5 watt/ us gallon. above that, my plants will not have any benefits from the extra wattage.

But as you can see, its only applicable best for a 2 feet tank and above. like your tank size, if we were to use 1.2 usg x 2 watt/usg = 2.4 watt which is unacceptable. there is a minimum amount of energy required for photosynthesis. for small tanks like yours, 7 watt might be enough. maybe you could go higher as you are providing them co2. and regarding you staghorn issue, it is due to ammonia/ low co2.

FYI, many ferts are safe for  shrimps. actually many death are due to overdosing co2. 

seachem's flourish excel is just a type of liquid carbon. 
u'll need macro n micro nutrients. macro-NPK, micro-trace elements
for ferts, kiminha is very pro. just ask him

Excel is liquid carbon, if you have co2 no need that, shrimps safe fert try borneowild lush for yiur moss.

You are most welcome ms Emily. Thank you mr jiejian for the kind words.    it is true as he said, you will need the macro and micro nutrients. you can buy the BW ferts as Mr arrow suggested. or you can also use Seachem ferts or even ADA ferts.
BW fert = try BW Lush
ADA = try Brghty shade/lights
Seachem = Flourish comprehensive

or you can also try dry ferts. its all up to your preference and budget.

lol... more expensive than building sand-yes
but overly expensive-no, affordable la.
good or not arr.. i like its colour and it inert    good news for shrimps. hehe