Rather than add iron from a bottle I find it's better to have it in the substrate for long term slow release - something like API First Layer Laterite or Tetra Complete Substrate mixed with the bottom substrate layer. I don't add any fertiliser to my tanks at all and the plants grow like crazy.

I once had 2 almost identical tanks set up, could grow plants in one but the plants always went yellow in the other. I put that down to the former having red granite rocks as decor, as the granite contains mineral iron which slowly leaches out.

Another thing I tried as an experiment  which is working surprisingly well was just to scatter a handful of panel pins on the bottom of the tank before putting sand in. The pins are presumably rusting away slowly releasing iron, and the plants are great!

Dennerle liquid daily A1 (can get it in small bottles) one squirt a day and API laterite as Ferox said....... sorted!

Have put the iron tabs in the substrait, when they get wet, they turn into a rather nice gooey brown mess when they get wet. Will find out if the fish are Ok with it in the morning.

Just binding ingredients I think.. Yeah, Maize Starch, Sodium Lauryl Sulphate, Gelatin, Liquid Paraffin and Purified Water. Only slightly worrying thing in there is the liquid parffin.. Will see how long they last, hopefully they'll perk my plants up!

thanks Sye!

consider dosing easy carbo or similar too nic

certainly heard of it jan, richards own brand,
never used it though always used easycarbo or excel and have been happy with that.

about the same price as the easy carbo i have

I noticed the various deals too Nic.
I bought my stuff from here last time as they had some good deals on ferts and foods http://www.zooplus.co.uk/shop/fish
They sell Easycarbo etc.

Good to hear that Nic, be interesting to see how long the effect lasts.