Hi all, I'm hoping you might part with some know how and comment on how I can improve on this very inexpensive nano tank.. the aim is to keep costs down as low as possible. That in mind, I can spend more if it's common sense; and that's where you come in The tank is a gift and it is (I think) ideal to be a home to a small family of cherry shrimp. The dimensions are 45 x 25 x 25 cm and is made of glass. Unfortunately it's also in a pretty bad state and will take quite a bit of cleaning to bring it up to usable standards. I have the chance of owning a second hand aqua nano 30 which is a 22 litre tank with dimensions 30 x 30 x 30 cm and despite my budget concerns I'm tempted due to the poor state of the free tank. Substrate has still to be decided and definitely need guidance. I will be buying inexpensive, easy to keep plants but does that mean I need plant friendly substrate? Do cherry shrimps get any benefit from the better substrate or can I source and use fine 1-3 mm black gravel? This is one component I am prepared to spend on if it means a clear benefit to the shrimpys and or plants. Currently looking at Dennerle shrimp gravel sulawesi black or borneo brown inert 1 mm but at 6.00 quid per 2kg plus postage it's a bit steep. Looks about as good as inert gets however.. Filter. OK I have a brand new cheap as chips Hidom internal filter with pump spray bar which I was going to make shrimp proof simply by attaching some fine mesh stocking or tights material over the inlet. The model is AP300L which should turn over 200 LPH and is equipped with a basic carbon filtered sponge. It has an adjustable flow rate which i think will be needed in a tank this size especially with the inhabitants being so tiny. This may or may not do a good job, and if someone can recommend an inexpensive HOB unit or similar then I am prepared to spend on this as this is something the tank will very much need to be working efficiently and effectively. Heater is unbought and will be buying a 50 watt. Planning on keeping the water at or around 77 to 79. Any suggestions will be well met. Accessories supplements and plants. I have already bought some Catappa leaves, cholla wood and plan on getting the crusta tubes purely to make them feel secure. Plants will be a straight forward affair consisting of Java fern and Moss. Possibly a moss ball and or an anaeubis plant if I think the tank would benefit. Before setting the substrate I'll be adding Glasgarten AE and possibly mironekuton powder in order to give the tank as best a start as I can, but if anyone can recommend alternatives or additionals then please please leave a comment. I'm not sure how to go about providing calcium for them so any cheap and cheerful methods would be most appreciated. Food will be a mix of my own home made recipe, which I think covers a lot of their needs and will be delicious for them, some blanched green vegs and some shrimp lab foods when I have the cash to spend. I have a fair bit of Hikari micro pellets from my daughters neon tank so I can use them sparingly to mix up their diet. Water will be Scottish tap treated with seachem prime, another benefit from my daughters tank and I may or may not add some fluval bio bacteria when doing the weekly or fortnightly water changes. Phew, I think that's it, sorry for the wall of text, for the TLDR people - any tips for a newbie shrimper would be well received thanks. Thanks for reading and unreserved thanks in advance for those of you taking the time to offer help by way of ideas, suggestions etc.. Allan.