I have a planted South American tank and a wonderful girlfriend, who wants me to pick out something for my fish tank for my birthday
She's so awesome.
The tank isn't stocked yet, but here's the stock list: 4x Bolivian Rams, 10x Card. Tetras, 7x Hatchets
So my tank, is pretty low-tech. 30 gal
, I have a Tetra Whisper 60 Filter, hydor theo heater, and a 39w T5HO light.
My question is:
What piece of equipment will give my tank the biggest bump in water quality/quality of life for my fish?